Selectively disengagable sealing system
US-10563765-B2 · Feb 18, 2020 · US
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Obrien Robert S patents in 2020
Obrien Robert S was listed as an assignee on 1 patent publication in 2020.
| Metric | Value |
|---|---|
| Company | Obrien Robert S |
| Year | 2020 |
| Patents | 1 |
Patents
Representative publications for Obrien Robert S in 2020.
Top CPC classifications
Most common classification codes for Obrien Robert S in 2020.
| CPC | Patents |
|---|---|
| E21B23/0412 | 1 |
| E21B23/06 | 1 |
| E21B33/10 | 1 |
| E21B33/12 | 1 |
| E21B33/128 | 1 |
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