Inventor

GROETTRUP HELMUT

4 patents

⚠️ This page may combine multiple inventors who share the name “GROETTRUP HELMUT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GAO GES AUTOMATION ORG

2 patents

US4249163AFeb 3, 1981

Automatic money dispenser and method

GAO GES AUTOMATION ORG46 citations90

US4291222ASep 22, 1981

Method and apparatus for card authentication using display of symbols for identification of a personal code word

GAO GES AUTOMATION ORG6 citations58

AUTOMATION U ORGANIZATION MBH

1 patent

US4841128AJun 20, 1989

Circuit unit

AUTOMATION U ORGANIZATION MBH31 citations87

GROETTRUP HELMUT

1 patent

US4230411AOct 28, 1980

Matrix printer

GROETTRUP HELMUT5 citations53