Zuvela; Bernard R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Zuvela; Bernard R..The latest application filed is for "lengthening drill string containing an instrument".
- Zuvela; Bernard R. - Fountain Valley CA
| Patent | Date |
|---|---|
| Lengthening drill string containing an instrument Grant 4,325,438 - Zuvela April 20, 1 | 1982-04-20 |
| Remote well signalling apparatus and methods Grant 4,181,014 - Zuvela , et al. January 1, 1 | 1980-01-01 |
| Inclination and direction responsive apparatus Grant 4,157,619 - Zuvela June 12, 1 | 1979-06-12 |
| Change in length of drill string while instrument remains therein Grant 4,153,120 - Zuvela , et al. May 8, 1 | 1979-05-08 |
| Change in length of drill string containing an instrument Grant 4,143,721 - Zuvela , et al. March 13, 1 | 1979-03-13 |
| Direction responsive flux gate unit Grant 4,139,950 - Zuvela February 20, 1 | 1979-02-20 |
| Acceleration Switch With Magnetic Permeable Metal Sleeve For Shunting Magnetic Field Grant 3,737,599 - Zuvela June 5, 1 | 1973-06-05 |
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