Inventor · disambiguated record
Helmut Grottrup
Also filed as: GROETTRUP HELMUT · GROTTRUP HELMUT
5 granted patents·111 citations·filing 1973–1981
81Inventor score
Top patents by PatentIndex Score
5 records- 0190US4157784ASafeguard against falsification of securities and the like which is suitable for automatic machinesGAO GES AUTOMATION ORG·Filed 1978·Granted Jun 12, 1979·61 cites·7 claims
- 0256US4841128ACircuit unitAUTOMATION U ORGANIZATION MBH·Filed 1981·Granted Jun 20, 1989·31 cites·33 claims
- 0338US4230411AMatrix printerGROETTRUP HELMUT·Filed 1978·Granted Oct 28, 1980·5 cites·18 claims
- 0438US3946869ATransparent packageGAO GES AUTOMATION ORG·Filed 1973·Granted Mar 30, 1976·8 cites·7 claims
- 0537US4291222AMethod and apparatus for card authentication using display of symbols for identification of a personal code wordGAO GES AUTOMATION ORG·Filed 1979·Granted Sep 22, 1981·6 cites·21 claims
Join the waitlist — get patent alerts
Get an alert when Helmut Grottrup 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 →