Robert F. Zelinka — 6 Patents at Perkins Manufacturing

Robert F. Zelinka has been granted 6 US patents while listed as an inventor at Perkins Manufacturing. The first was granted in 1988 and the most recent in November 1993. Robert F. Zelinka ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Robert F. Zelinka in Roselle, IL, US.

Patents per Year

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #	Title	Co-Inventors	Date
5257877	Lifting device	John W. Redding	1993-11-02
5069593	Lifting device	John W. Redding	1991-12-03
5024573	Lifting device	John W. Redding	1991-06-18
4911600	Lifting device	John W. Redding	1990-03-27
4796488	Differential whose a ring gear is mounted in sound damping manner on its carrier	Faust Hagin, Franz Seethaler, Manfred Stiglmaier	1989-01-10
4741658	Receptacle dumping apparatus and method	John W. Redding	1988-05-03