Individual holder
SPRUNG PHILIP D
CA·11 granted patents·317 citations·filing 1977–1988
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
11 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
- 0479US4982527ASeedling propagation assemblySPRUNG PHILIP D·Filed 1988·Granted Jan 8, 1991·29 cites·12 claims
- 0575US4956936AMethod and system for purification of water for greenhouse structuresSPRUNG PHILIP D·Filed 1988·Granted Sep 18, 1990·34 cites·20 claims
- 0668US4833825ASystem for supporting growing plantsSPRUNG PHILIP D·Filed 1986·Granted May 30, 1989·26 cites·22 claims
- 0753US4788791ACooling system for greenhouse structuresSPRUNG PHILIP D·Filed 1986·Granted Dec 6, 1988·16 cites·20 claims
- 0847US4996791AMethod and structure for improved natural lighting for plant growthSPRUNG PHILIP D·Filed 1988·Granted Mar 5, 1991·12 cites·12 claims
- 0946US4800674AGreenhouse structureSPRUNG PHILIP D·Filed 1986·Granted Jan 31, 1989·12 cites·11 claims
- 1032US4830276AHeater system for greenhousesSPRUNG PHILIP D·Filed 1987·Granted May 16, 1989·4 cites·11 claims
- 1129US4770347AAeration 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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