Inventor
Manfred Janssen
Inventor
Krefeld, DE
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F16Lprimary
F16LPipes30%
B21KMaking forged or pressed metal products, e.g. horse-shoes, rivets, bolts or wheels20%
B21CManufacture of metal sheets, wire, rods, tubes, profiles or like semi-manufactured products otherwise than by rolling10%
B21JForging10%
B60JWindows, windscreens, non-fixed roofs, doors, or similar devices for vehicles10%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general10%
Y10TTechnical subjects covered by former us classification10%
PatentTitleYear
5,956,988'Process for heading pipe ends and device for implementing it'19995,260,522'Double-wall hollow body with interlayer and method for manufacturing same'19935,221,121'Reinforcement element for the body of an automobile'19934,583,773'Releasable tubular clamps for the connection of cylindrical or profiled tubes'19864,313,328'Providing cardan and universal joint-type shafts with gearing'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–1993Patents assigned to MANNESMANN AG (3)· patent assignee history
1982–1999Based in Krefeld, DE· patent location history
1986Patents assigned to JANSSEN MANFRED (1)· patent assignee history
1999Patents assigned to AUDI AG AND FAHRZEUGWERK WERDA (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MANNESMANN AG | 3 | 1982–1993 |
| AUDI AG AND FAHRZEUGWERK WERDA | 1 | 1999 |
| JANSSEN MANFREDself | 1 | 1986 |
Locations
| Location | Patents | Span |
|---|---|---|
| Krefeld, DE | 5 | 1982–1999 |