Inventor · Besigheim, DE

Norbert Keim

42Patents
12h-index
58Co-inventors
84Inventor score

Filing activity: Jun 21, 1991 → Aug 25, 2011

Most-cited inventions

PatentTitleAreaCited byStatus
US5996911A Electromagnetically actuated valve Mechanical Engineering; Lighting; Heating 79 Expired
US5732888A Electromagnetically operable valve Mechanical Engineering; Lighting; Heating 62 Expired
US5769965A Method for treating at least one part of soft magnetic material to form a hard wear area Electricity 39 Expired
US6619269B1 Fuel injector Emerging Cross-Sectional Technologies 33 Expired
US6494388B1 Fuel injection valve Mechanical Engineering; Lighting; Heating 25 Expired
US6382533B1 Fuel injection valve Emerging Cross-Sectional Technologies 25 Expired
US6826833B1 Fuel injection valve and a method for manufacturing exit outlets on the valve Emerging Cross-Sectional Technologies 22 Expired
US6089473A Valve, in particular a fuel injection valve Emerging Cross-Sectional Technologies 22 Expired
US6772965B2 Fuel injection valve Mechanical Engineering; Lighting; Heating 20 Expired
US6685105B1 Fuel injection valve Mechanical Engineering; Lighting; Heating 17 Expired
US5791568A Leaf vacuum/chopper Human Necessities 13 Expired
US5428331A Component substrate and method for holding a component made of ferromagnetic material Emerging Cross-Sectional Technologies 12 Expired
US6244526A Fuel injection valve Electricity 12 Expired
US6679222B1 Method of metering fuel using a fuel injector Mechanical Engineering; Lighting; Heating 10 Expired
US7260462B2 Method for controlling an electromagnetic valve, in particular for an automatic transmission of a motor vehicle Emerging Cross-Sectional Technologies 9 Expired
US6637677B1 Fuel injector Mechanical Engineering; Lighting; Heating 8 Expired
US7086614B2 Fuel injector Mechanical Engineering; Lighting; Heating 7 Expired
US6474565B1 Fuel injection valve Mechanical Engineering; Lighting; Heating 6 Expired
US6405942B1 Fuel injector with compensating sealing element Emerging Cross-Sectional Technologies 5 Expired
US6681999B1 Fuel injection valve Emerging Cross-Sectional Technologies 4 Expired
US5160520A Process for the production of a blank mold for glass fiber optical waveguides Chemistry; Metallurgy 4 Expired
US6685113B1 Actuator Mechanical Engineering; Lighting; Heating 3 Expired
US6840459B1 Fuel injection valve Mechanical Engineering; Lighting; Heating 3 Expired
US6712289B1 Fuel injection valve Mechanical Engineering; Lighting; Heating 2 Expired
US5255854A Burner head for gas burners Mechanical Engineering; Lighting; Heating 2 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.