Inventor
Eric M. Twardowski
Inventor
Spring, TX, US
Overview
Patents· 18 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling85%
A01GHorticulture5%
B22FWorking metallic powder5%
F16CShafts5%
PatentTitleYear
11,060,383Wear bushing deployment and retrieval tool for subsea wellhead202110,662,743Wear bushing deployment and retrieval tool for subsea wellhead202010,590,733Method and apparatus for sealing tubulars202010,161,217Ball seat apparatus and method20189,745,821'Method and apparatus for sealing tubulars'20179,719,303'Subsea drilling with casing'20179,500,044'Tubular coupling device'20169,493,989'Subsea drilling with casing'20169,488,004'Subsea casing drilling system'20169,297,210'Earth removal member with features for facilitating drill-through'20169,027,643'Method of removing cutters'20158,839,880'Subsea drilling with casing'20148,528,669'Earth removal member with features for facilitating drill-through'20138,074,749'Earth removal member with features for facilitating drill-through'20117,712,549'Drilling tool'20106,488,103'Drilling tool and method of using same'20026,213,931'Stump grinding tooth'20015,816,347'PDC clad drill bit insert'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998–2010Patents assigned to DENNIS TOOL COMPANY (3)· patent assignee history
1998Based in Houston, TX, US· patent location history
2001–2021Based in Spring, TX, US· patent location history
2011–2016Patents assigned to TWARDOWSKI ERIC M (4)· patent assignee history
2011–2016Patents assigned to WEATHERFORD LAMB (4)· patent assignee history
2011–2015Patents assigned to BEATTIE SCOTT (3)· patent assignee history
2016–2021Patents assigned to WEATHERFORD TECH HOLDINGS LLC (9)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WEATHERFORD TECH HOLDINGS LLC | 9 | 2016–2021 |
| TWARDOWSKI ERIC Mself | 4 | 2011–2016 |
| WEATHERFORD LAMB | 4 | 2011–2016 |
| BEATTIE SCOTT | 3 | 2011–2015 |
| DENNIS TOOL COMPANY | 3 | 1998–2010 |
Locations
| Location | Patents | Span |
|---|---|---|
| Spring, Texas, US | 17 | 2001–2021 |
| Houston, Texas, US | 1 | 1998 |