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Inventor

Gerhard Krug

Inventor
Duisburg, DE

Overview

5→
Patents
1979–2003
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 5 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F16Lprimary
F16LPipes50%
E21BEarth or rock drilling40%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%
PatentTitleYear
6,585,299'Pipe connector'20036,513,840'Drill rod coupling'20036,511,102'Pipe connector'20035,048,871'Screwed pipe joint'19914,153,283'Casing joint'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–2003Patents assigned to MANNESMANN AG (4)· patent assignee history
1979Based in Dusseldorf, DE· patent location history
1991–2003Based in Duisburg, DE· patent location history
2003Patents assigned to VALLOUREC MANNESMANN OIL & GAS (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MANNESMANN AG41979–2003
VALLOUREC MANNESMANN OIL & GAS12003
Locations
LocationPatentsSpan
Duisburg, DE41991–2003
Dusseldorf, DE11979