David P. Knivsland

Person

North St. Paul, MN, US

People

Patents Grantslast 30 patents

Information Patent Grant
Respirator facepiece with thermoset elastomeric face seal
- Patent number 8,820,326
- Issue date Sep 2, 2014
- 3M Innovative Properties Company
- Paul J. Flannigan
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Full-face respirator lens
- Patent number D426298
- Issue date Jun 6, 2000
- 3M Innovative Properties Company
- Vaughn B. Grannis
- D24 - Medical and laboratory equipment
Information Patent Grant
Two position pressure demand inlet port adaptor
- Patent number D421301
- Issue date Feb 29, 2000
- 3M Innovative Properties Company
- Joseph G. Reischel
- D24 - Medical and laboratory equipment
Information Patent Grant
Inlet port adaptor on a full-face respirator lens
- Patent number D421118
- Issue date Feb 22, 2000
- 3M Innovative Properties Company
- Joseph G. Reischel
- D24 - Medical and laboratory equipment
Information Patent Grant
Full face respirator mask having integral connectors disposed in le...
- Patent number 5,924,420
- Issue date Jul 20, 1999
- Minnesota Mining and Manufacturing Company
- Joseph G. Reischel
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Full face respirator lens
- Patent number D409744
- Issue date May 11, 1999
- Minnesota Mining and Manufacturing Company
- Vaughn B. Grannis
- D24 - Medical and laboratory equipment
Information Patent Grant
Full face respirator lens
- Patent number D388872
- Issue date Jan 6, 1998
- Minnesota Mining and Manufacturing Company
- Vaughn B. Grannis
- D24 - Medical and laboratory equipment
Information Patent Grant
Full face respirator
- Patent number D378610
- Issue date Mar 25, 1997
- Minnesota Mining and Manufacturing Company
- Joseph G. Reischel
- D24 - Medical and laboratory equipment

Patents Applicationslast 30 patents

Information Patent Application
Unitary Respirator With Molded Thermoset Elastomeric Elements
- Publication number 20150128936
- Publication date May 14, 2015
- 3M Innovative Properties Company
- Paul J. Flannigan
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
UNITARY RESPIRATOR WITH MOLDED THERMOSET ELASTOMERIC ELEMENTS
- Publication number 20100218761
- Publication date Sep 2, 2010
- 3M INNOVATIVE PROPERTIES COMPANY
- Paul J. Flannigan
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
RESPIRATOR FACEPIECE WITH THERMOSET ELASTOMERIC FACE SEAL
- Publication number 20100206311
- Publication date Aug 19, 2010
- Paul J. Flannigan
- A62 - LIFE-SAVING FIRE-FIGHTING

David P. Knivsland

Person

Patents Grantslast 30 patents

Respirator facepiece with thermoset elastomeric face seal

Full-face respirator lens

Two position pressure demand inlet port adaptor

Inlet port adaptor on a full-face respirator lens

Full face respirator mask having integral connectors disposed in le...

Full face respirator lens

Full face respirator lens

Full face respirator

Patents Applicationslast 30 patents

Unitary Respirator With Molded Thermoset Elastomeric Elements

UNITARY RESPIRATOR WITH MOLDED THERMOSET ELASTOMERIC ELEMENTS

RESPIRATOR FACEPIECE WITH THERMOSET ELASTOMERIC FACE SEAL