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A retainer apparatus including a first retainer portion, a second retainer portion, a transceiver, and a sensor comprising a motion detector. The retainer apparatus includes the first retainer portion configured to be slidably attached to a first harness strap and a second retainer portion configure

A retainer apparatus including a first retainer portion, a second retainer portion, a transceiver, and a sensor comprising a motion detector. The retainer apparatus includes the first retainer portion configured to be slidably attached to a first harness strap and a second retainer portion configured to be slidably attached to a second harness strap. The first retainer portion is removably attached to the second retainer portion. The motion detector is configured to detect movement of the retainer apparatus and transmit a warning signal, via the transceiver, to a controller within a vehicle comprising the retainer apparatus to alert a user in the vehicle if the movement is detected.

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1. A retainer apparatus comprising: a first retainer portion configured to be slidably attached to a first adjustable harness strap of a car seat;a second retainer portion configured to be slidably attached to a second adjustable harness strap of the car seat, wherein said first retainer portion is

1. A retainer apparatus comprising: a first retainer portion configured to be slidably attached to a first adjustable harness strap of a car seat;a second retainer portion configured to be slidably attached to a second adjustable harness strap of the car seat, wherein said first retainer portion is removably attached to said second retainer portion;a transceiver;a sensor comprising a motion detector, wherein said motion detector is configured to detect movement of said retainer apparatus, wherein said movement comprises moving along said first adjustable harness strap and said second adjustable harness strap in a first vertical direction extending from lower attachment points of said first adjustable harness strap to said car seat and of said second adjustable harness strap to said car seat, respectively, wherein said movement further comprises moving along said first adjustable harness strap and said second adjustable harness strap in a second vertical direction extending from first upper attachment points of said first adjustable harness strap to said car seat and of said second adjustable harness strap to said car seat, respectively, wherein said motion detector is configured to transmit a warning signal, via said transceiver, to a controller within a vehicle comprising said retainer apparatus to alert a user in said vehicle if said movement of said retainer apparatus is detected; anda braking mechanism configured to resist said movement of said first retainer portion and said second retainer portion along said first adjustable harness strap and said second adjustable harness strap, wherein said braking mechanism comprises a braking device comprising braking portions configured for locking together thereby contacting opposite surfaces of said first adjustable harness strap and said second adjustable harness strap for applying resistance to said first adjustable harness strap and said second adjustable harness strap to hold at least one of said first retainer portion and said second retainer portion in a first stationary position along at least one of said first adjustable harness strap and said second adjustable harness strap, wherein said braking mechanism further comprises a locking portion configured to apply mechanical pressure and lock said braking portions of said braking device, and wherein said transceiver, said sensor, and said braking mechanism are contained within at least one of said first retainer portion and said second retainer portion. 2. The retainer apparatus of claim 1, wherein said movement further comprises said first retainer portion being disconnected from said second retainer portion. 3. The retainer apparatus of claim 1, further comprising: memory within said retainer apparatus, wherein said memory is configured to store distance data associated with distances with respect to said first retainer portion and said second retainer portion moving along said first adjustable harness strap and said second adjustable harness strap. 4. The retainer apparatus of claim 1, wherein said retainer apparatus, said first adjustable harness strap and said second adjustable harness strap are comprised by a harness apparatus mechanically attached to said car seat, and wherein said harness apparatus is configured to restrain an occupant of said car seat and prevent said occupant from being ejected from said car seat. 5. The retainer apparatus of claim 1, wherein said transceiver comprises a wireless transceiver. 6. The retainer apparatus of claim 1, wherein said braking mechanism comprises said braking device configured to apply resistance to said first adjustable harness strap and said second adjustable harness strap respectively to hold said retainer apparatus in multiple stationary positions along said first adjustable harness strap and said second adjustable harness strap. 7. The retainer apparatus of claim 6, wherein said braking mechanism further comprises a magnetic structure configured to apply said resistance. 8. The retainer apparatus of claim 1, wherein said first vertical direction comprises an opposite direction from said second vertical direction. 9. A car seat apparatus comprising: a first adjustable harness strap;a second adjustable harness strap;a retainer apparatus comprising a first retainer portion slidably attached to said first harness strap and a second retainer portion slidably attached to said second harness strap, wherein said first retainer portion is removably attached to said second retainer portion, wherein said retainer apparatus further comprises a transceiver and a sensor comprising a motion detector, wherein said motion detector is configured to detect movement of said retainer apparatus, wherein said movement comprises moving along said first adjustable harness strap and said second adjustable harness strap in a first vertical direction extending from lower attachment points of said first adjustable harness strap to a car seat and of said second adjustable harness strap to said car seat, respectively, wherein said movement further comprises moving along said first adjustable harness strap and said second adjustable harness strap in a second vertical direction extending from first upper attachment points of said first adjustable harness strap to said car seat and of said second adjustable harness strap to said car seat, respectively, wherein said motion detector is configured to transmit a warning signal, via said transceiver, to a controller within a vehicle comprising said car seat apparatus to alert a user in said vehicle if said movement of said retainer apparatus is detected, wherein said retainer apparatus further comprises a braking mechanism configured to resist said movement of said first retainer portion and said second retainer portion along said first adjustable harness strap and said second adjustable harness strap, wherein said braking mechanism comprises a braking device comprising braking portions configured for locking together thereby contacting opposite surfaces of said first adjustable harness strap and said second adjustable harness strap for applying resistance to said first adjustable harness strap and said second adjustable harness strap to hold at least one of said first retainer portion and said second retainer portion in a first stationary position along at least one of said first adjustable harness strap and said second adjustable harness strap, wherein said braking mechanism further comprises a locking portion configured to apply mechanical pressure and lock said braking portions of said braking device, and wherein said transceiver, said sensor, and said braking mechanism are contained within at least one of said first retainer portion and said second retainer portion; anda car seat structure comprising a harness apparatus mechanically attached to said car seat, wherein said retainer apparatus, said first adjustable harness strap, and said second adjustable harness strap are comprised by said harness apparatus, and wherein said harness apparatus is configured to restrain an occupant of said car seat apparatus and prevent said occupant from being ejected from said car seat apparatus. 10. The car seat apparatus of claim 9, further comprising: memory within said retainer apparatus, wherein said memory is configured to store distance data associated with distances with respect to said first retainer portion and said second retainer portion moving along said first adjustable harness strap and said second adjustable harness strap. 11. The car seat apparatus of claim 9, wherein said movement of said retainer apparatus further comprises said first retainer portion being disconnected from said second retainer portion. 12. The car seat apparatus of claim 9, wherein said transceiver comprises a wireless transceiver. 13. The car seat apparatus of claim 9, wherein said braking mechanism comprises said braking device configured to apply resistance to said first adjustable harness strap and said second adjustable harness strap respectively to hold said retainer apparatus in multiple stationary positions along said first adjustable harness strap and said second adjustable harness strap. 14. The car seat apparatus of claim 9, further comprising: an additional retainer apparatus comprising a third retainer portion slidably attached to said first harness strap and a fourth retainer portion slidably attached to said second harness strap, wherein said third retainer portion is removably attached to said fourth retainer portion, wherein said additional retainer apparatus further comprises an additional transceiver and an additional sensor comprising an additional motion detector, wherein said additional motion detector is configured to detect additional movement of said additional retainer apparatus, wherein said additional motion detector is configured transmit an additional warning signal, via said additional transceiver, to said controller within said vehicle comprising said car seat apparatus to alert said user in said vehicle if said additional movement of said additional retainer apparatus is detected, and wherein said additional transceiver and said additional sensor are contained within at least one of said first retainer portion and said second retainer portion. 15. The car seat apparatus of claim 14, wherein said additional movement of said additional retainer apparatus comprises said third retainer portion being disconnected from said fourth retainer portion. 16. A retainer apparatus comprising: a first retainer portion configured to be slidably attached to a first adjustable harness strap of a car seat;a second retainer portion configured to be slidably attached to a second adjustable harness strap of the car seat, wherein said first retainer portion is removably attached to said second retainer portion;a transceiver; anda sensor comprising a motion detector, wherein said motion detector is configured to detect movement of said retainer apparatus, wherein said movement comprises moving along said first adjustable harness strap and said second adjustable harness strap in a first vertical direction extending from lower attachment points of said first adjustable harness strap to said car seat and of said second adjustable harness strap to said car seat, respectively, wherein said movement further comprises moving along said first adjustable harness strap and said second adjustable harness strap in a second vertical direction extending from first upper attachment points of said first adjustable harness strap to said car seat and of said second adjustable harness strap to said car seat, respectively, wherein said motion detector is configured to transmit a warning signal, via said transceiver, to a controller within a vehicle comprising said retainer apparatus to alert a user in said vehicle if said movement of said retainer apparatus is detected. 17. The retainer apparatus of claim 16, wherein said movement further comprises said first retainer portion being disconnected from said second retainer portion. 18. The retainer apparatus of claim 16, wherein said first vertical direction comprises an opposite direction from said second vertical direction. 19. The retainer apparatus of claim 16, further comprising: memory within said retainer apparatus, wherein said memory is configured to store distance data associated with distances with respect to movement along said first adjustable harness strap and said second adjustable harness strap. 20. The retainer apparatus of claim 16, wherein said transceiver comprises a wireless transceiver.