Robert I. Keur has been granted 13 US patents. The first was granted in 1982 and the most recent in April 2002. Robert I. Keur ranks #362,438 of 4,157,543 US inventors in our database (top 8.7%). Patent records list Robert I. Keur in Niles, IL, US.
Patents per Year Patents granted per year, 1982 to 2002 Bar chart with a peak of 3 patents in 1995. peak 3 1982: 1 patents 1982 1988: 1 patents 1988 1989: 1 patents 1989 1991: 2 patents 1991 1992: 1 patents 1992 1993: 1 patents 1993 1995: 3 patents 1995 1998: 1 patents 1998 1999: 1 patents 1999 2002: 1 patents 2002 Issued Patents All Time
Showing 1–13 of 13 patents
Patent # Title Co-Inventors Date
6364457 Continuous ink jet printing head having feedback control housing parts and field replaceable filter and nozzle assemblies Paul S. Colecchi 2002-04-02
5867194 Method and apparatus for automatic setting of nozzle drive voltage in an ink jet printer James E. Clark , Philip D. Anderson 1999-02-02
RE35737 Accoustically soft ink jet nozzle assembly George Sourlis , Nikodem Zyznieuski , Roger T. Slisz 1998-02-24
5432541 Nozzle drive control system and method for ink jet printing James R. Pickell , James E. Clark 1995-07-11
5420624 Method and apparatus for correcting printing distortions in an ink jet printer Timothy Braun , Bruce Ortquist 1995-05-30
5396274 Variable frequency ink jet printer Bruce Ortquist , Timothy Braun 1995-03-07
5196860 Ink jet droplet frequency drive control system James R. Pickell , James E. Clark 1993-03-23
5126755 Print head assembly for ink jet printer Colin R. Sharpe 1992-06-30
5063393 Ink jet nozzle with dual fluid resonances James E. Clark 1991-11-05
5039997 Impact-valve printhead for ink jet printing Elaine A. Pullen , Gerry B. Andeen 1991-08-13
4860027 Ink drop control system with temperature compensation Joseph P. Ozelis 1989-08-22
4727379 Accoustically soft ink jet nozzle assembly George Sourlis , Nikodem Zyznieuski , Roger T. Slisz 1988-02-23
4319251 Ink jet printing employing reverse charge coupling — 1982-03-09