Elwart; John Ernest
Patent Applications and Registrations
Patent applications and USPTO patent grants for Elwart; John Ernest.The latest application filed is for "earthquake water shutoff valve".
- Elwart; John Ernest - Playa Del Rey CA US
| Patent | Date |
|---|---|
| Earthquake water shutoff valve Grant 10,788,139 - Elwart September 29, 2 | 2020-09-29 |
| Earthquake water shutoff valve App 20190383410 - Elwart; John Ernest | 2019-12-19 |
| Self grounding electrical outlet Grant 9,124,052 - Elwart September 1, 2 | 2015-09-01 |
| Self grounding electrical outlet App 20150087169 - Elwart; John Ernest | 2015-03-26 |
| Shock responsive check valve App 20100326544 - Elwart; John Ernest | 2010-12-30 |
| Metal fireblock App 20050050834 - Elwart, John Ernest | 2005-03-10 |
| Wireless telephone charging adapter App 20040204178 - Elwart, John Ernest | 2004-10-14 |
| Shock responsive momentary relay Grant 6,756,701 - Elwart June 29, 2 | 2004-06-29 |
| Shock responsive momentary relay App 20030102719 - Elwart, John Ernest | 2003-06-05 |
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