FF

Ferdinand Freudenstein

General Motors: 4 patents #3,733 of 18,328Top 25%
CU Columbia University: 3 patents #470 of 2,492Top 20%
Overall (All Time): #768,451 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4917066 Swing beam internal-combustion engines Wayne J. Sohn 1990-04-17
4865577 Noncircular drive 1989-09-12
4821695 Swing beam internal combustion engines 1989-04-18
4418586 Swash plate drive mechanism E. Roland Maki 1983-12-06
4393820 Rolling contact rocker arm and pivot Emil R. Maki, Raymond L. Richard, Jr., Meng-Sang Chew 1983-07-19
4332148 Cyclic phase-change coupling Emil R. Maki 1982-06-01
4270495 Variable displacement piston engine E. Roland Maki 1981-06-02