Inventor · disambiguated record
Fred R. Spielman
Also filed as: SPIELMAN FRED · SPIELMAN FRED R
2 granted patents·1 pending application·12 citations·filing 2004–2009
50Inventor score
Technology areasB66B
Top patents by PatentIndex Score
3 records- 0172US8356697B2Elevator safety system and methodOTIS ELEVATOR CO·Filed 2005·Granted Jan 22, 2013·12 cites·19 claims
- 0241US2012024675A1Drive assembly for a passenger conveyorSPIELMAN FRED R·Filed 2009·Application pending·0 cites
- 0335US7726459B2Passenger conveyor step having an acoustic barrierOTIS ELEVATOR CO·Filed 2004·Granted Jun 1, 2010·0 cites·24 claims
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