Inventor

BIRKEL JEFFREY F

US3 patents

⚠️ This page may combine multiple inventors who share the name “BIRKEL JEFFREY F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

(unassigned)

1 patent

US5925857AJul 20, 1999

Inverted cone tuned exhaust system

14 citations68

CATERPILLAR INC

1 patent

US7793562B2Sep 14, 2010

Transmission and shift method

CATERPILLAR INC1 citations43

TURNER POWERTRAIN SYTEMS LTD

1 patent

US7942074B2May 17, 2011

Gearbox with synchronizing clutch

TURNER POWERTRAIN SYTEMS LTD0 citations38