River Rock Inc.

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Santa Fe Springs, CA, US

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Patents Applicationslast 30 patents

Information Patent Application
AIR ADMITTANCE VALVE PREVENTING MEPHITIS OVERFLOW
- Publication number 20200011439
- Publication date Jan 9, 2020
- River Rock Inc.
- Chao Chi Chen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
AIR ADMITTANCE VALVE PREVENTING MEPHITIS OVERFLOW
- Publication number 20180038496
- Publication date Feb 8, 2018
- River Rock Inc.
- Chao Chi Chen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
AIR ADMITTANCE VALVE PREVENTING MEPHITIS OVERFLOW
- Publication number 20160201814
- Publication date Jul 14, 2016
- River Rock Inc.
- Chao Chi Chen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...