George A. L. David

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West Hartford, CT, US

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Patents Grantslast 30 patents

Information Patent Grant
Elevator system with overlapped roped-coupler segments
- Patent number 5,857,545
- Issue date Jan 12, 1999
- Otis Elevator Company
- David W. Barrett
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Elevator cars switch hoistways while traveling vertically
- Patent number 5,816,368
- Issue date Oct 6, 1998
- Otis Elevator Company
- David W. Barrett
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Recalibrating an elevator load measuring system
- Patent number 4,939,679
- Issue date Jul 3, 1990
- Otis Elevator Company
- George A. L. David
- B66 - HOISTING LIFTING HAULING