Inventor
YULKOWSKI LEON
US23 patents
⚠️ This page may combine multiple inventors who share the name “YULKOWSKI LEON”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
YULKOWSKI LEON
8 patentsUS8844200B2Sep 30, 2014
Electrical door operator
YULKOWSKI LEON35 citations92
US8261491B2Sep 11, 2012
Concealed electrical door operator
YULKOWSKI LEON25 citations90
US10378262B2Aug 13, 2019
Door operator and clutch
YULKOWSKI LEON11 citations84
US10221609B2Mar 5, 2019
Concealed electrical door operator
YULKOWSKI LEON11 citations82
US5297315AMar 29, 1994
Suspension for hinged door
YULKOWSKI LEON9 citations73
US4545607AOct 8, 1985
Door construction
YULKOWSKI LEON16 citations73
US4093284AJun 6, 1978
Door construction
YULKOWSKI LEON11 citations73
US3969845AJul 20, 1976
Door construction
YULKOWSKI LEON13 citations73
TD IP HOLDCO LLC
8 patentsUS10024096B2Jul 17, 2018
Door monitoring system
TD IP HOLDCO LLC9 citations91
US9536357B2Jan 3, 2017
Door monitoring system
TD IP HOLDCO LLC10 citations91
US11713608B2Aug 1, 2023
Door monitoring system
TD IP HOLDCO LLC5 citations84
US11199041B2Dec 14, 2021
Concealed electrical door operator
TD IP HOLDCO LLC10 citations83
US11028630B2Jun 8, 2021
Door monitoring system
TD IP HOLDCO LLC3 citations83
US10415294B2Sep 17, 2019
Door monitoring system
TD IP HOLDCO LLC8 citations83
US11098517B2Aug 24, 2021
Door operator and clutch
TD IP HOLDCO LLC4 citations73
US9651130B2May 16, 2017
Gear assembly with spiral gears
TD IP HOLDCO LLC5 citations73
(unassigned)
5 patentsUS6259352B1Jul 10, 2001
Door lock system
146 citations98
US6705047B2Mar 16, 2004
Door and door closer assembly
114 citations97
US6049287AApr 11, 2000
Door with integrated smoke detector and hold open
94 citations97
US6183023B1Feb 6, 2001
Door with integrated fire exit device
23 citations92
US5400474AMar 28, 1995
Suspension for hinged door
3 citations62