Helmut Kottmann — 2 Patents | Patent Leaderboard

Helmut Kottmann has been granted 2 US patents. The first was granted in 1981 and the most recent in May 1998. Helmut Kottmann ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Helmut Kottmann in Neukirchen, DE.

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Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5755191	Two-stroke internal combustion engine with charging cylinder	—	1998-05-26
4303044	Aluminium 2-stroke engine cylinder and crank case	—	1981-12-01

Helmut Kottmann — 2 Patents

Issued Patents All Time

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