W-N Apache Corporation
Wichita Falls, TX, US· latest recorded location
W-N Apache Corporation is named on 14 US grants and 0 published applications in this corpus. Its most frequent classification is E21B (Earth or rock drilling).
- Granted patents
- 14
- Published applications
- 0
- Inventors
- 7
- Granted in 2026 so far
- 0
- Most recent grant
- 29 Mar 1994
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
By publication year.
Technology areas
Share of 14 documents
Recent patents
- Apparatus for gripping a down hole tubular for support and rotation29 Mar 1994US 5,297,833 A
- Automatic sequencing system for earth drilling machine15 Mar 1994US 5,294,228 A
- Lifting device for down hole tubulars28 Dec 1993US 5,273,388 A
- Feeding device for down hole tubulars9 Nov 1993US 5,259,723 A
- Centering spinning for down hole tubulars8 Oct 1991US 5,054,550 A
No published applications.
Most cited
By later US patents
- Apparatus for gripping a down hole tubular for support and rotation176US 5,297,833 A1994
- Compact casing tongs for use on top head drive earth drilling machine156US 4,867,236 A1989
- Apparatus for gripping a down hole tubular for rotation145US 5,036,927 A1991
- Internal wrench for a top head drive assembly123US 4,762,187 A1988
- Modular drilling machine and components thereof100US 4,759,414 A1988