Inventor · disambiguated record
Bertil R. L. Werjefelt
Also filed as: WERJEFELT BERTIL · WERJEFELT BERTIL R L
28 granted patents·510 citations·filing 1979–2019
97Inventor score
Top patents by PatentIndex Score
28 records- 0192US4832287AOperator station emergency visual assurance method and apparatusWERJEFELT BERTIL·Filed 1987·Granted May 23, 1989·91 cites·68 claims
- 0289US8453969B2Glare shield equipped with an emergency vision apparatusWERJEFELT BERTIL R L·Filed 2011·Granted Jun 4, 2013·11 cites·19 claims
- 0384US8705189B2Emergency vision apparatus with closable hand openingWERJEFELT BERTIL R L·Filed 2011·Granted Apr 22, 2014·7 cites·11 claims
- 0484US7583455B2Gas activated emergency vision deviceWERJEFELT BERTIL R L·Filed 2005·Granted Sep 1, 2009·12 cites·16 claims
- 0583US4683880AToxic fume protective hood and method of constructionDU PONT·Filed 1983·Granted Aug 4, 1987·57 cites·11 claims
- 0680US6460804B2Emergency vision apparatusFiled 2001·Granted Oct 8, 2002·22 cites·33 claims
- 0777US8213101B2Gas activated emergency vision deviceWERJEFELT BERTIL R L·Filed 2009·Granted Jul 3, 2012·6 cites·10 claims
- 0875US10215991B2Hand-held emergency vision apparatus and systemWERJEFELT BERTIL R L·Filed 2016·Granted Feb 26, 2019·3 cites·18 claims
- 0975US9329393B2Emergency vision apparatus with touch sensitive screen and closable hand openingWERJEFELT BERTIL R L·Filed 2014·Granted May 3, 2016·3 cites·23 claims
- 1075US9193477B2Glare shield equipped with an emergency vision apparatusWERJEFELT BERTIL R L·Filed 2013·Granted Nov 24, 2015·5 cites·13 claims
- 1174US12097964B2Emergency vision system with fixed and hand-held enclosuresWERJEFELT BERTIL·Filed 2019·Granted Sep 24, 2024·2 cites·22 claims
- 1274US5947415AEmergency vision deviceFiled 1997·Granted Sep 7, 1999·44 cites·16 claims
- 1373US9567103B2Glare shield equipped with an emergency vision apparatusWERJEFELT BERTIL R L·Filed 2015·Granted Feb 14, 2017·2 cites·15 claims
- 1471US8411382B2Emergency vision apparatus with distributed stowage spaceWERJEFELT BERTIL R L·Filed 2009·Granted Apr 2, 2013·5 cites·21 claims
- 1571US5318250APilot visual assurance apparatus for an aircraft cockpitWERJEFELT BERTIL·Filed 1992·Granted Jun 7, 1994·44 cites·17 claims
- 1670US6082673AEmergency vision deviceFiled 1999·Granted Jul 4, 2000·38 cites·4 claims
- 1767US5202796AEmergency visual assurance apparatus for an aircraft cockpitWERJEFELT BERTIL·Filed 1992·Granted Apr 13, 1993·39 cites·24 claims
- 1867US4440164ALife support system and method of providing fresh air to enclosed areasWERJEFELT BERTIL·Filed 1981·Granted Apr 3, 1984·28 cites·18 claims
- 1964US9956440B2Oxygen supply with carbon dioxide scrubber for emergency useWERJEFELT BERTIL R L·Filed 2015·Granted May 1, 2018·1 cites·19 claims
- 2064US4627431AProtective hood with CO2 absorbentDU PONT·Filed 1985·Granted Dec 9, 1986·30 cites·13 claims
- 2163US4461155AAircraft cabin ventilation systemWERJEFELT BERTIL·Filed 1980·Granted Jul 24, 1984·24 cites·28 claims
- 2262US8888042B2Emergency vision apparatusWERJEFELT BERTIL R L·Filed 2008·Granted Nov 18, 2014·6 cites·24 claims
- 2354US9914546B2Electro-optical emergency vision apparatusWERJEFELT BERTIL R L·Filed 2008·Granted Mar 13, 2018·1 cites·31 claims
- 2451US4437318AEnvironmental control system and methodWERJEFELT BERTIL R L·Filed 1979·Granted Mar 20, 1984·11 cites·12 claims
- 2546US6645064B1Smoke evacuation deviceFiled 2002·Granted Nov 11, 2003·4 cites·7 claims
- 2644US4998529ADecompression and toxic fume protection apparatusXENEX CORP·Filed 1989·Granted Mar 12, 1991·14 cites·7 claims
- 2740US8573514B1Smoke evacuation deviceWERJEFELT BERTIL R L·Filed 2003·Granted Nov 5, 2013·0 cites·5 claims
- 2839US11383847B2Emergency vision apparatus with hand accessWERJEFELT BERTIL R L·Filed 2017·Granted Jul 12, 2022·0 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Bertil R. L. Werjefelt files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →