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OPUS INC

US5 patents

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US5682835ANov 4, 1997

Bird feeder

OPUS INC144 citations95

US4523546AJun 18, 1985

Squirrel-proof bird feeder

OPUS INC63 citations95

US4498423AFeb 12, 1985

Bird feeder

OPUS INC35 citations86

USD278168SMar 26, 1985

Bird feeder

OPUS INC25 citations80

USD278559SApr 23, 1985

Bird feeder

OPUS INC13 citations70