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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0100939 (2002-03-19) |
발명자 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 17 인용 특허 : 18 |
A clog-free roof drain cover assembly includes a first drain cover fixed over the drain, and a second drain cover which is vertically movable relative to the first drain cover. The second drain cover includes a base provided with weep holes, a skirt located above the weep holes, a hat-shaped portion
A clog-free roof drain cover assembly includes a first drain cover fixed over the drain, and a second drain cover which is vertically movable relative to the first drain cover. The second drain cover includes a base provided with weep holes, a skirt located above the weep holes, a hat-shaped portion
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