David L. Piekarski

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Ashby, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Adjustable exhaust system for internal combustion engine
- Patent number 6,799,423
- Issue date Oct 5, 2004
- David L. Piekarski
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Exhaust system for internal combustion engine having parallelogram-...
- Patent number 6,742,332
- Issue date Jun 1, 2004
- David L. Piekarski
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...

Patents Applicationslast 30 patents

Information Patent Application
Adjustable exhaust system for internal combustion engine
- Publication number 20030136120
- Publication date Jul 24, 2003
- David L. Piekarski
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Exhaust system for internal combustion engine having parallelogram-...
- Publication number 20030136121
- Publication date Jul 24, 2003
- David L. Piekarski
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES