Inventor

JOHANSEN TROND V

NO3 patents

Patents

3 patents

US4852391AAug 1, 1989

Pipeline vehicle

NORSKE STATS OLJESELSKAP176 citations95

US4941511AJul 17, 1990

Device with a valve function

NORSKE STATS OLJESELSKAP20 citations65

US4852614AAug 1, 1989

Shut-off device which can be inserted into a pipeline

NORSKE STATS OLJESELSKAP6 citations59