Sihlis; Lennard
Patent Applications and Registrations
Patent applications and USPTO patent grants for Sihlis; Lennard.The latest application filed is for "profile selective system for downhole tools".
- Sihlis; Lennard - Albert CA
- Sihlis; Lennard - Calgary CA
- Sihlis; Lennard - Alberta CA
| Patent | Date |
|---|---|
| Profile selective system for downhole tools Grant 10,563,480 - Campbell , et al. Feb | 2020-02-18 |
| Profile Selective System for Downhole Tools App 20170350215 - Campbell; Sean Patrick ; et al. | 2017-12-07 |
| Profile selective system for downhole tools Grant 9,739,117 - Campbell , et al. August 22, 2 | 2017-08-22 |
| Profile Selective System For Downhole Tools App 20150060076 - CAMPBELL; Sean Patrick ; et al. | 2015-03-05 |
| Orienting tool for coiled tubing drilling Grant 5,894,896 - Smith , et al. April 20, 1 | 1999-04-20 |
| Adjustable bent housing II Grant 5,269,385 - Sihlis December 14, 1 | 1993-12-14 |
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