Allan W. Opsahl

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Renton, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Hold-open lock
- Patent number 4,726,146
- Issue date Feb 23, 1988
- The Boeing Company
- Allan W. Opsahl
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Aircraft door counterbalance system
- Patent number 4,601,446
- Issue date Jul 22, 1986
- The Boeing Company
- Allan W. Opsahl
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Counterbalanced hinge assembly
- Patent number 4,589,613
- Issue date May 20, 1986
- The Boeing Company
- Allan W. Opsahl
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Flap torque tube slot seal
- Patent number 4,576,347
- Issue date Mar 18, 1986
- The Boeing Company
- Allan W. Opsahl
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Powered outward-opening cargo door
- Patent number 4,510,714
- Issue date Apr 16, 1985
- The Boeing Company
- James R. Kasper
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Spring operated counterbalance hinge assembly for aircraft doors
- Patent number 4,479,623
- Issue date Oct 30, 1984
- The Boeing Company
- Alex Maraghe
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Canopy-type aircraft cargo door and actuating mechanisms
- Patent number 4,473,201
- Issue date Sep 25, 1984
- The Boeing Company
- Franklin K. Barnes
- B64 - AIRCRAFT AVIATION COSMONAUTICS