Number | Name | Date | Kind |
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1176057 | Heinrich | Mar 1916 | |
1715710 | Kinnard | Jun 1929 | |
4108281 | Glaser | Aug 1978 | |
4568909 | Whynacht | Feb 1986 | |
4622538 | Whynacht et al. | Nov 1986 | |
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4930604 | Schienda et al. | Jun 1990 | |
5443142 | Glaser | Aug 1995 | |
5445245 | Ketoviita | Aug 1995 |
Number | Date | Country |
---|---|---|
WO9608437 | Mar 1996 | WOX |
Entry |
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Copy of U.S. Patent Application Serial No. 08/738,667 entitled "Monitoring of Elevator Door Performance" filed Oct. 25, 1996, Ronald R. Pepin, et al. |
Copy of U.S. Patent Application Serial No. 08/757306 entitled "Monitoring of Elevator Door Reversal Data" filed Nov. 27, 1996, Sanjay Kamani, et al. |