David John Harper

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Eugene, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Retractable snowboard support apparatus for use in lift assist tran...
- Patent number 7,484,765
- Issue date Feb 3, 2009
- David John Harper
- A63 - SPORTS GAMES AMUSEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Apparatus and method for removing outer member of plastic pipe joint
- Publication number 20080011468
- Publication date Jan 17, 2008
- David John Harper
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
Apparatus and method for removing inner member of plastic pipe joint
- Publication number 20080003069
- Publication date Jan 3, 2008
- David John Harper
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
Retractable snowboard support apparatus for use in lift assist tran...
- Publication number 20070152418
- Publication date Jul 5, 2007
- David John Harper
- B61 - RAILWAYS