Inventor · disambiguated record
Philip D. Sprung
Also filed as: SPRUNG PHILIP D · SPRUNG PHILIP DAVIS · SPRUNG SR PHILIP D
14 granted patents·1 pending application·382 citations·filing 1977–2015
94Inventor score
Top patents by PatentIndex Score
15 records- 0194US5001859AMethod and structure for environmental control of plant growthSPRUNG PHILIP D·Filed 1986·Granted Mar 26, 1991·78 cites·24 claims
- 0290US4137687AStressed membrane space enclosureSPRUNG PHILIP D·Filed 1977·Granted Feb 6, 1979·56 cites·8 claims
- 0387US4118904ABuilding structureSPRUNG PHILIP D·Filed 1977·Granted Oct 10, 1978·50 cites·17 claims
- 0485US9777505B2Door system for movable structuresSPRUNG INSTANT STRUCTURES LTD·Filed 2015·Granted Oct 3, 2017·7 cites·19 claims
- 0584US7849639B2Stressed membrane structureSPRUNG INSTANT STRUCTURES LTD·Filed 2004·Granted Dec 14, 2010·36 cites·37 claims
- 0679US4982527ASeedling propagation assemblySPRUNG PHILIP D·Filed 1988·Granted Jan 8, 1991·29 cites·12 claims
- 0775US4956936AMethod and system for purification of water for greenhouse structuresSPRUNG PHILIP D·Filed 1988·Granted Sep 18, 1990·34 cites·20 claims
- 0868US4833825ASystem for supporting growing plantsSPRUNG PHILIP D·Filed 1986·Granted May 30, 1989·26 cites·22 claims
- 0953US4788791ACooling system for greenhouse structuresSPRUNG PHILIP D·Filed 1986·Granted Dec 6, 1988·16 cites·20 claims
- 1049US5283993AHydraulically-operated scissor opening for stressed membrane structureSPRUNG SR PHILIP D·Filed 1991·Granted Feb 8, 1994·22 cites·19 claims
- 1147US4996791AMethod and structure for improved natural lighting for plant growthSPRUNG PHILIP D·Filed 1988·Granted Mar 5, 1991·12 cites·12 claims
- 1246US4800674AGreenhouse structureSPRUNG PHILIP D·Filed 1986·Granted Jan 31, 1989·12 cites·11 claims
- 1343US2003019166A1Door arrangement for tensioned membrane structureFiled 2002·Application pending·0 cites
- 1432US4830276AHeater system for greenhousesSPRUNG PHILIP D·Filed 1987·Granted May 16, 1989·4 cites·11 claims
- 1529US4770347AAeration assembly for a nutrient feed solution for a nutrient film propagation system for plantsSPRUNG PHILIP D·Filed 1986·Granted Sep 13, 1988·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →