Paul C. Chang

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Tustin, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Adjustable flow pulsating pool sweep
- Patent number 7,434,285
- Issue date Oct 14, 2008
- Paul C. Chang
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Torsion spring pool cleaner reed valve
- Patent number 6,615,864
- Issue date Sep 9, 2003
- Paul C. Chang
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Pool cleaner diaphragm valve
- Patent number 6,098,228
- Issue date Aug 8, 2000
- Paul C. Chang
- E04 - BUILDING
Information Patent Grant
Reed valve for pool cleaner
- Patent number 5,992,451
- Issue date Nov 30, 1999
- Paul C. Chang
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
TORSION SPRING POOL CLEANER REED VALVE
- Publication number 20030140968
- Publication date Jul 31, 2003
- Paul C. Chang
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...