David C. Ludington

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Ithaca, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Vacuum level control system using variable frequency drive
- Patent number 5,960,736
- Issue date Oct 5, 1999
- Cornell Research Foundation, Inc.
- David C. Ludington
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Vacuum level control system using variable frequency drive
- Patent number 5,878,691
- Issue date Mar 9, 1999
- Cornell Research Foundation, Inc.
- David C. Ludington
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Controlling vacuum level with a two-level vacuum system controller...
- Patent number 5,284,180
- Issue date Feb 8, 1994
- Cornell Research Foundation, Inc.
- Fangjiang Guo
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Two-level vacuum system controller with adjustable speed drive
- Patent number 5,141,403
- Issue date Aug 25, 1992
- Cornell Research Foundation, Inc.
- Fangjiang Guo
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING