Hewitt; Martin
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hewitt; Martin.The latest application filed is for "ultrasonic fluid level sensor".
- Hewitt; Martin - Selden NY
- Hewitt; Martin - West Chester PA
- Hewitt; Martin - Church Crookham EN
| Patent | Date |
|---|---|
| Ultrasonic fluid level sensor Grant 7,418,860 - Austerlitz , et al. September 2, 2 | 2008-09-02 |
| Ultrasonic fluid level sensor App 20060090563 - Austerlitz; Howard ; et al. | 2006-05-04 |
| Multi-frequency ultrasonic liquid level gauging system Grant 5,996,407 - Hewitt December 7, 1 | 1999-12-07 |
| Telephone answering machines Grant 4,004,276 - Robinson , et al. January 18, 1 | 1977-01-18 |
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