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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0537804 (1983-09-30) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 8 인용 특허 : 5 |
A swimming instruction device in the form of a kickboard having a top surface and a bottom surface. The kickboard is buoyant to float on water with at least a portion of the bottom surface in contact with the water and the top surface facing upwardly and away from the water. Additionally, the kickbo
A swimming instruction device, comprising; a kickboard having a top surface and a bottom surface, said kickboard being buoyant to float on water with at least a portion of said bottom surface in contact with the water and said top surface facing upwardly and away from the water, said kickboard inclu
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