Harper; Stephen James
Patent Applications and Registrations
Patent applications and USPTO patent grants for Harper; Stephen James.The latest application filed is for "pressure difference responsive electric switches with releasable detents and direction of response indicators".
- Harper; Stephen James - Stoke EN
- Harper; Stephen James - Coventry EN
| Patent | Date |
|---|---|
| Sleeve Mounting Grant 3,631,738 - Harper January 4, 1 | 1972-01-04 |
| Pressure Difference Responsive Electric Switches With Releasable Detents And Direction Of Response Indicators Grant 3,632,924 - Harper January 4, 1 | 1972-01-04 |
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