HITACHI ELEVATOR ENGINEERING AND SERVICE CO., LTD.
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Oct 13, 1992 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 139 Total Citation Count
- Apr 21, 1981 Earliest Filing
- 8 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5090515 Passenger transport installation, vehicle for use therein, and method of operating said installationExpiredMar 19, 90Feb 25, 92[B66B]
4916368 Controlling method and device for permanent magnet synchronous motorExpiredNov 14, 88Apr 10, 90[H02K, H62P]
4649751 Supervisory operation control system for protecting elevators or the like from a dangerous situationExpiredMar 11, 85Mar 17, 87[B66B]
4427940 Electromagnetic inspecting apparatus for magnetizable wire ropeExpiredApr 21, 81Jan 24, 84[G01N, G01R]
Top Inventors for This Owner
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