Extended whipstock and mill assembly
US-9228406-B2 · Jan 5, 2016 · US
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Campbell John E — Fixed Constructions
Campbell John E holds 2 patents in Fixed Constructions, with representative filings summarized below.
| Metric | Value |
|---|---|
| Company | Campbell John E |
| Technology | Fixed Constructions |
| Patents in slice | 2 |
| Recent patents in slice | 0 |
| First year | 2015 |
| Last year | 2016 |
Representative patents
Notable publications linking Campbell John E to Fixed Constructions.
Extended whipstock and mill assembly
US-9228406-B2 · Jan 5, 2016 · US
Pressure activated flow switch for a downhole tool
US-8967300-B2 · Mar 3, 2015 · US
Pressure activated flow switch for a downhole tool
US-8967300-B2 · Mar 3, 2015 · US
Pressure activated flow switch for a downhole tool
US-8967300-B2 · Mar 3, 2015 · US
Recent filings
Latest patents from Campbell John E in Fixed Constructions.
Extended whipstock and mill assembly
US-9228406-B2 · Jan 5, 2016 · US
Extended whipstock and mill assembly
US-9228406-B2 · Jan 5, 2016 · US
Pressure activated flow switch for a downhole tool
US-8967300-B2 · Mar 3, 2015 · US
Pressure activated flow switch for a downhole tool
US-8967300-B2 · Mar 3, 2015 · US
Pressure activated flow switch for a downhole tool
US-8967300-B2 · Mar 3, 2015 · US
Related pages
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