RO

Robert J. O'Hara

WI Windsor Industries: 14 patents #1 of 32Top 4%
AA Aar: 5 patents #2 of 28Top 8%
Overall (All Time): #175,923 of 4,157,543Top 5%
24
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6357070 Multi-function, battery-powered, rider cleaning machine Daniel C. Venard, Christopher M. Knowlton 2002-03-19
6220490 Drinking vest 2001-04-24
6073304 Squeegee adjustment method and apparatus Christopher M. Knowlton 2000-06-13
5993563 Combination of main scrubbing machine and attachment scrubbing machine Timothy A. Strickland, Richard C. Brigman 1999-11-30
5802665 Floor cleaning apparatus with two brooms Christopher M. Knowlton, Timothy A. Strickland 1998-09-08
5742975 Articulated floor scrubber Christopher M. Knowlton 1998-04-28
D391697 Articulated floor cleaner Christopher M. Knowlton 1998-03-03
D382383 Floor scrubber Christopher M. Knowlton 1997-08-12
5630246 Floor cleaning apparatus with flap having wear indicator Christopher M. Knowlton, Timothy A. Strickland 1997-05-20
5628086 Floor cleaning apparatus with squeegee mounting system Christopher M. Knowlton 1997-05-13
5611108 Floor cleaning apparatus with slidable flap Christopher M. Knowlton, Timothy A. Strickland 1997-03-18
5608947 Floor cleaning apparatus with pre-filter Christopher M. Knowlton, Timothy A. Strickland 1997-03-11
D376227 Floor sweeper Christopher M. Knowlton 1996-12-03
5555596 Floor cleaning apparatus Christopher M. Knowlton 1996-09-17
5485653 Floor cleaning apparatus Christopher M. Knowlton, Timothy A. Strickland 1996-01-23
5467500 Steering mechanism for a cleaning vehicle Christopher M. Knowlton 1995-11-21
5455979 Apparatus for monitoring cleaning element wear Frederick M. Bores, Mark A. Betker 1995-10-10
5346034 Vehicle engine mounting system Christopher M. Knowlton 1994-09-13
5265300 Floor scrubber Christopher M. Knowlton 1993-11-30
D329311 Sweeper vehicle Christopher M. Knowlton 1992-09-08
5137108 Vehicle engine mounting system Christopher M. Knowlton 1992-08-11
D291932 Machine for floor sweeping and scrubbing Christopher M. Knowlton 1987-09-15
4518012 Air damper assembly with movable blades 1985-05-21
4419535 Multi-cable conduit for floors and walls 1983-12-06