Assignee
GIFFORD HILL & COMPANY INC
US·8 granted patents·170 citations·filing 1975–1990
Top patents by PatentIndex Score
8 records- 0178US4953280AMethod of manufacturing prestressed concrete culvertsGIFFORD HILL & COMPANY INC·Filed 1990·Granted Sep 4, 1990·65 cites·15 claims
- 0278US4311226ATrapped-axle conveyor rollGIFFORD HILL & COMPANY INC·Filed 1980·Granted Jan 19, 1982·39 cites·3 claims
- 0357US3974845ASelf-correcting linearly movable irrigation systemGIFFORD HILL & COMPANY INC·Filed 1975·Granted Aug 17, 1976·23 cites·20 claims
- 0453US3997192AUniversal coupling for movable irrigation pipesGIFFORD HILL & COMPANY INC·Filed 1975·Granted Dec 14, 1976·12 cites·18 claims
- 0551US3946946ASelf propelled sprinkling irrigation apparatusGIFFORD HILL & COMPANY INC·Filed 1975·Granted Mar 30, 1976·11 cites·7 claims
- 0636USD268094SLeveling washerGIFFORD HILL & COMPANY INC·Filed 1979·Granted Mar 1, 1983·4 cites·1 claims
- 0735US3999569AIrrigation sprinkling apparatus with adjustable ground contacting elementsGIFFORD HILL & COMPANY INC·Filed 1975·Granted Dec 28, 1976·9 cites·8 claims
- 0828US4897120AAccelerator for portland cement derived from fertilizerGIFFORD HILL & COMPANY INC·Filed 1988·Granted Jan 30, 1990·7 cites·7 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →