Inventor
Friedrich H. Langer
Inventor
Houston, TX, US
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling67%
H05KPrinted circuits17%
Y10TTechnical subjects covered by former us classification17%
PatentTitleYear
4,984,633'Nozzle effect protectors, centralizers, and stabilizers and related methods'19914,979,562'Float equipment including float collars and modular plugs for well operations'19904,913,768'Process for producing electrical conductor boards'19904,794,986'Reticulated centralizing apparatus'19894,589,495'Apparatus and method for inserting flow control means into a well casing'1986Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1986–1991Patents assigned to WEATHERFORD US INC (4)· patent assignee history
1986–1991Based in Houston, TX, US· patent location history
1990Patents assigned to BAYER AG (1)· patent assignee history
1990Based in Bergisch Gladbach, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WEATHERFORD US INC | 4 | 1986–1991 |
| BAYER AG | 1 | 1990 |
Locations
| Location | Patents | Span |
|---|---|---|
| Houston, Texas, US | 4 | 1986–1991 |
| Bergisch Gladbach, DE | 1 | 1990 |