David V. Smith

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Vancouver, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electric fish barrier for water intakes at varying depths
- Patent number 6,978,734
- Issue date Dec 27, 2005
- Smith-Root, Inc.
- David V. Smith
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Electric fish shocking devices using programmable output waveforms
- Patent number 5,327,854
- Issue date Jul 12, 1994
- Smith-Root, Inc.
- David V. Smith
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Fish repelling apparatus using a plurality of series connected puls...
- Patent number 4,750,451
- Issue date Jun 14, 1988
- David V. Smith
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Wire tag etching system
- Patent number 4,713,315
- Issue date Dec 15, 1987
- David V. Smith
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Tag implantation system and method
- Patent number 4,672,967
- Issue date Jun 16, 1987
- David V. Smith
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE