Inventor · disambiguated record
Hans D. Christen
Also filed as: CHRISTEN HANS · CHRISTEN HANS D
13 granted patents·287 citations·filing 1982–1993
92Inventor score
Files withRAIN BIRD SPRINKLER MFG13
Top patents by PatentIndex Score
13 records- 0191US4502631ATrickle irrigation unitRAIN BIRD SPRINKLER MFG·Filed 1983·Granted Mar 5, 1985·61 cites·10 claims
- 0282US4726520AContinuous tube emitterRAIN BIRD SPRINKLER MFG·Filed 1986·Granted Feb 23, 1988·50 cites·45 claims
- 0379US5377914ASpeed controlled rotating sprinklerRAIN BIRD SPRINKLER MFG·Filed 1993·Granted Jan 3, 1995·52 cites·27 claims
- 0478US5158231AMini-sprinkler stake assembly and mini-sprinkler unit and deflector thereforeRAIN BIRD SPRINKLER MFG·Filed 1991·Granted Oct 27, 1992·59 cites·44 claims
- 0569USD334333SGround support stake for irrigation tubingRAIN BIRD SPRINKLER MFG·Filed 1991·Granted Mar 30, 1993·16 cites·1 claims
- 0658USD282960SSprinkler nozzleRAIN BIRD SPRINKLER MFG·Filed 1983·Granted Mar 11, 1986·7 cites·1 claims
- 0749USD285476SImpact drive sprinklerRAIN BIRD SPRINKLER MFG·Filed 1984·Granted Sep 2, 1986·4 cites·1 claims
- 0848USD282768SSprinkler drive armRAIN BIRD SPRINKLER MFG·Filed 1983·Granted Feb 25, 1986·4 cites·1 claims
- 0942US4580724AImpact drive sprinklerRAIN BIRD SPRINKLER MFG·Filed 1982·Granted Apr 8, 1986·12 cites·13 claims
- 1039USD276454SImpact drive sprinklerRAIN BIRD SPRINKLER MFG·Filed 1982·Granted Nov 20, 1984·2 cites·1 claims
- 1138US5090621AConstant drive nozzle for impulse irrigation sprinklersRAIN BIRD SPRINKLER MFG·Filed 1990·Granted Feb 25, 1992·13 cites·15 claims
- 1236US4625913ASprinkler having two-piece drive arm bridgeRAIN BIRD SPRINKLER MFG·Filed 1984·Granted Dec 2, 1986·7 cites·17 claims
- 1329USD349752SRotating spinner irrigation sprinklerRAIN BIRD SPRINKLER MFG·Filed 1993·Granted Aug 16, 1994·0 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →