RL

Roger W. Lhotak

TG The Chamberlain Group: 11 patents #21 of 278Top 8%
📍 Bartlett, IL: #43 of 601 inventorsTop 8%
🗺 Illinois: #8,017 of 84,256 inventorsTop 10%
Overall (All Time): #462,631 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
9458902 Movable barrier hydraulic braking Brian Roy Skotty 2016-10-04
8783426 Movable barrier hydraulic braking Brian Roy Skotty 2014-07-22
8001725 Shaft joint 2011-08-23
6414454 Pass point system for controlling the operation of movable barriers James J. Fitzgibbon, Robert J. Olmsted, Kenneth Joseph Dombrowski 2002-07-02
6051947 Pass point system for controlling the operation of movable barriers James J. Fitzgibbon, Robert J. Olmsted, Kenneth Joseph Dombrowski 2000-04-18
5860365 Tensioning device for flexible drive member 1999-01-19
5761850 Garage door operator having vibration damper for noise reduction Kenneth Joseph Dombrowski 1998-06-09
5297782 Modular snubber apparatus Kenneth Joseph Dombrowski 1994-03-29
5239776 Garage door opener 1993-08-31
5137500 Sprocket conversion kit for garage door opener 1992-08-11
4973257 Battery terminal 1990-11-27