Siegfried Jackwerth — 3 Patents at Amazon

Siegfried Jackwerth has been granted 3 US patents while listed as an inventor at Amazon. The first was granted in 1997 and the most recent in August 2014. Siegfried Jackwerth ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Siegfried Jackwerth in Friedrichsdorf, DE.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
8813931	Free-wheel cage ring with centrifugal-force lifting	Karlheinz Timtner, Ruprecht Maurer	2014-08-26
7870940	Frictionally engaged free-wheel clutch	Thomas Heubach	2011-01-18
5645149	Freewheel-retainer ring with centrifugal force takeoff	Ruprecht Maurer, Karlheinz Timtner	1997-07-08

Siegfried Jackwerth — 3 Patents

Issued Patents All Time

Patent Widget