Remote elevator monitoring system
US4568909A · kind A · utility
121Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1983 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Dec 19, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0037
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A plurality of operating systems in buildings organized in geographical groups, each group having a local service office, are monitored at both the local offices and a central office for the presence of various combinations of performance criteria defining alarm conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.