Inventor · Dortmund, DE

Michael Kaufmann

59Patents
9h-index
35Co-inventors
78Inventor score

Filing activity: Apr 17, 1975 → May 17, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US5779242A Method for players to play a tournament of games where game scores are obtained Human Necessities 123 Expired
US4078604A Cooling channel surface arrangement for a heat exchanger wall construction Mechanical Engineering; Lighting; Heating 37 Expired
US8920530B2 Filter element and filter system Performing Operations; Transporting 27 Active
US9254457B2 Air filter system, air filter element and method for exchanging an air filter element Performing Operations; Transporting 22 Active
US10245541B2 Air filter system, air filter element and method for exchanging an air filter element Emerging Cross-Sectional Technologies 14 Active
USD762834S1 Air filter General 14 Active
US9358489B2 Air filter system, air filter element and method for exchanging an air filter element Emerging Cross-Sectional Technologies 13 Active
US5578204A Apparatus for recovery and buffer exchange and/or concentration of dissolved macromolecules from a mixture of macromolecules Physics 10 Expired
USD430557S Cover for a radio antenna General 9 Expired
US8466641B2 Power tool having an electric brake Electricity 8 Active
US10337471B2 Filter and filter cartridge Performing Operations; Transporting 8 Active
US9457308B2 Filter element and filter system with a filter element Emerging Cross-Sectional Technologies 6 Active
US5798253A Method of culturing micro-organisms under a mutagenic influence Emerging Cross-Sectional Technologies 6 Expired
US9205360B2 Filter element and housing for a filter element Emerging Cross-Sectional Technologies 5 Active
US8523973B2 Filter element for fluid filtration, in particular for intake air of internal combustion engines Performing Operations; Transporting 5 Active
US9587598B2 Filter housing and filter assembly Mechanical Engineering; Lighting; Heating 5 Active
US9511317B2 Air filter system and air filter element for an air filter system Emerging Cross-Sectional Technologies 4 Active
USD817468S1 Filter housing General 4 Active
US9457307B2 Filter system with filter element Emerging Cross-Sectional Technologies 3 Active
US10961957B2 Filter and filter cartridge Performing Operations; Transporting 3 Active
US10159923B2 Hollow filter element, grip device of a hollow filter element, and filter device with at least one hollow filter element Performing Operations; Transporting 3 Active
US9233333B2 Filter element Performing Operations; Transporting 2 Active
US11311890B2 Filter device Mechanical Engineering; Lighting; Heating 2 Active
US8466663B2 Method and power supply system for preventing functional impairing transient noise within high frequency operated integrated circuits Electricity 2 Active
US10337472B2 Filter and filter cartridge Performing Operations; Transporting 2 Active

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