First; David J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for First; David J..The latest application filed is for "device and methods of measuring pressure".
- First; David J. - Carlisle MA
- First; David J. - North Billerica MA
| Patent | Date |
|---|---|
| Device and methods of measuring pressure Grant 8,333,568 - Luongo , et al. December 18, 2 | 2012-12-18 |
| Device and Methods of Measuring Pressure App 20080260558 - Luongo; Joseph A. ; et al. | 2008-10-23 |
| Control system for screw compressor Grant 4,412,788 - Shaw , et al. * November 1, 1 | 1983-11-01 |
| Control system for screw compressor Grant 4,249,866 - Shaw , et al. February 10, 1 | 1981-02-10 |
| Voltage to frequency converter Grant 4,031,532 - First June 21, 1 | 1977-06-21 |
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