Acceleration, deceleration controlled by switches along path

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Patents Grantslast 30 patents

Information Patent Grant
Elevator system having microprocessor-based door operator
- Patent number 4,832,158
- Issue date May 23, 1989
- Delaware Capital Formation, Inc.
- Dennis J. Farrar
- G05 - CONTROLLING REGULATING
Information Patent Grant
2992818
- Patent number 2,992,818
- Issue date Jul 18, 1961
- G05 - CONTROLLING REGULATING
Information Patent Grant
2931462
- Patent number 2,931,462
- Issue date Apr 5, 1960
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
2858904
- Patent number 2,858,904
- Issue date Nov 4, 1958
- G05 - CONTROLLING REGULATING
Information Patent Grant
1989148
- Patent number 1,989,148
- Issue date Jan 29, 1935
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES