HH

Helmut Hirtz

Overall (All Time): #1,662,664 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5156092 Dual track permanent way — 1992-10-20
4914314 Anti-theft device for motor vehicles using an electronic engine control — 1990-04-03
4881469 Operating system for high speed tunnel trains — 1989-11-21