최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0575808 (1975-05-08) |
발명자 / 주소 |
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출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 26 인용 특허 : 0 |
A clock radio including, within the housing for the clock radio, a relay coil connected across a line cord for the clock radio, normally open relay contacts connected for passing power to the clock radio from the line cord and normally closed relay contacts connected for passing power from a battery
1. In combination with alarm clock apparatus, a housing for said alarm clock apparatus, said housing being adapted to receive a battery and connecting means carried by said housing for drawing electric power from a wall outlet, the improvement within said housing comprising: a battery charger fed by
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