Inventor · disambiguated record
Friedhelm Retzlaff
Also filed as: RETZLAFF FRIEDHELM
4 granted patents·87 citations·filing 1979–1987
76Inventor score
Top patents by PatentIndex Score
4 records- 0187US4827099AMethod and apparatus for continuous production of tubular bodies by means of laser longitudinal seam weldingHOESCH AG·Filed 1987·Granted May 2, 1989·66 cites·29 claims
- 0254US4656332AUse of the laser welding process for and method of manufacturing of welded construction parts for exhaust installationsHOESCH AG·Filed 1985·Granted Apr 7, 1987·13 cites·6 claims
- 0348US4414042AMethod of making high strength steel tubeHOESCH WERKE AG·Filed 1979·Granted Nov 8, 1983·6 cites·1 claims
- 0430US4732623AMethod of making high strength steel tubeHOESCH WERKE AG·Filed 1984·Granted Mar 22, 1988·2 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Friedhelm Retzlaff files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →