Assignee
OPTREL AG
CH20 patents
Top patents by PatentIndex Score
US6675800B2Jan 13, 2004
Emergency flight safety device
OPTREL AG58 citations93
US5793449AAug 11, 1998
Protective device
OPTREL AG33 citations92
US5571217ANov 5, 1996
Protective assembly for the protection of the human head
OPTREL AG93 citations89
US4863244ASep 5, 1989
Electro-optic welding lens assembly
OPTREL AG98 citations89
USD310276SAug 28, 1990
Welding mask
OPTREL AG26 citations88
US6270223B1Aug 7, 2001
Active electro-optical filter device and glare-protection device
OPTREL AG39 citations87
US5510609AApr 23, 1996
Electrically controllable optical filter element
OPTREL AG30 citations87
US7161116B2Jan 9, 2007
Welding protective mask with illumination equipment
OPTREL AG23 citations86
USD365666SDec 26, 1995
Welding helmet
OPTREL AG45 citations81
US9610198B2Apr 4, 2017
Protection device for a welder
OPTREL AG7 citations80
US10736782B2Aug 11, 2020
Face protector
OPTREL AG5 citations71
US6887531B2May 3, 2005
Glare protection device
OPTREL AG9 citations71
US6891681B2May 10, 2005
Anti-glare protection device
OPTREL AG13 citations70
US6796652B1Sep 28, 2004
Glare-protection device with a screened evaluation circuit
OPTREL AG14 citations70
US6941577B2Sep 13, 2005
Antiglare device for welding protective masks
OPTREL AG10 citations68
US5854667ADec 29, 1998
Electrooptical filter cartridge and a method for manufacturing the same
OPTREL AG10 citations68
USRE45677ESep 29, 2015
Anti-glare protection device
OPTREL AG4 citations67
USD316164SApr 9, 1991
Holder for face visor, hearing protector and similar equipment
OPTREL AG11 citations65
US7800034B2Sep 21, 2010
Dazzle protection unit for a portable dazzle protection device including a light capturing element guiding light to at least one sensor
OPTREL AG2 citations56
US10098788B2Oct 16, 2018
Electro-optical glare-protection filter with a liquid crystal cell being a fringe-field switching cell for a welder protection device
OPTREL AG0 citations46