Inventor · disambiguated record
Christian G. Tonna
Also filed as: TONNA CHRISTIAN · TONNA CHRISTIAN G
8 granted patents·95 citations·filing 1990–2006
87Inventor score
Top patents by PatentIndex Score
8 records- 0179US5305855ASealed elevator cab entrance assemblyOTIS ELEVATOR CO·Filed 1993·Granted Apr 26, 1994·33 cites·7 claims
- 0266US5139112AElevator car door lockOTIS ELEVATOR CO·Filed 1990·Granted Aug 18, 1992·22 cites·5 claims
- 0362US8448751B2Elevator door systemTONNA CHRISTIAN G·Filed 2006·Granted May 28, 2013·5 cites·11 claims
- 0447US7246688B2Elevator door systemOTIS ELEVATOR CO·Filed 1998·Granted Jul 24, 2007·16 cites·21 claims
- 0540US5584365ATelescoping elevator door systemOTIS ELEVATOR CO·Filed 1994·Granted Dec 17, 1996·9 cites·17 claims
- 0629US5129486AElevator door lockOTIS ELEVATOR CO·Filed 1990·Granted Jul 14, 1992·5 cites·5 claims
- 0727US5203431AElevator rotary lost door interlockOTIS ELEVATOR CO·Filed 1992·Granted Apr 20, 1993·3 cites·7 claims
- 0826US5207298AElevator rotary door interlockOTIS ELEVATOR CO·Filed 1992·Granted May 4, 1993·2 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →