DM

Darwin T. McKnight

HL Hoover Limited: 34 patents #5 of 240Top 3%
📍 Louisville, OH: #2 of 111 inventorsTop 2%
🗺 Ohio: #1,443 of 73,341 inventorsTop 2%
Overall (All Time): #104,002 of 4,157,543Top 3%
34
Patents All Time

Issued Patents All Time

Showing 1–25 of 34 patents

Patent #TitleCo-InventorsDate
D546510 Foot of an upright vacuum cleaner Richard S. Parr, William G. Alford, Matthew J. Archer 2007-07-10
D509933 Middle handle portion for a floor cleaner Richard S. Parr 2005-09-20
D485028 Upper portion of an upright vacuum cleaner Richard S. Parr, William G. Alford 2004-01-06
D473986 Foot of an upright vacuum cleaner Richard S. Parr, William G. Alford, Matthew J. Archer 2003-04-29
6401296 Vacuum cleaner nozzle adapter John D. Essex, Kenneth L. Symensma 2002-06-11
6374452 Tool storage door for a floor care appliance John D. Essex, Gad Shaanan, Ivan Brousseau, Walter Francovich, Luc Mion 2002-04-23
D450896 Vacuum cleaner tool door John D. Essex 2001-11-20
6038732 Vacuum cleaner nozzle adapter John D. Essex, Kenneth L. Symensma 2000-03-21
D415596 Top front portion of a handle portion of an upright carpet extractor John D. Essex 1999-10-19
D403482 Handle portion of an upright carpet extractor John D. Essex, David M. J. Allgeier, Kevin S. Waltz 1998-12-29
D398100 Carpet extractor Ronald J. Stephens, Douglas C. Barker, Darwin S. Crouser, Edgar A. Maurer 1998-09-08
D393113 Turbine powered extractor nozzle John D. Essex 1998-03-31
D381142 Vacuum cleaner latch David W. Moine 1997-07-15
D372567 Combined wet and dry vacuum cleaner David W. Moine, Ronald J. Stephens, Richard A. Wareham 1996-08-06
D361179 Combined wet and dry vacuum cleaner David W. Moine, Ronald J. Stephens, Richard A. Wareham 1995-08-08
D358242 Vacuum cleaner nozzle 1995-05-09
D354378 Utility blower Richard A. Wareham 1995-01-10
5331714 Stacked looped hose rack for upright cleaner John D. Essex 1994-07-26
5303447 Hose and tool rack for upright vacuum cleaner and method for mounting same 1994-04-19
D344821 Combined vacuum cleaner hose and tool rack 1994-03-01
D339435 Vacuum cleaner upper portion Lynn A. Frederick 1993-09-14
D338990 Suction cleaner nozzle 1993-08-31
D338753 Conversion door for vacuum cleaner hood David W. Moine 1993-08-24
5233722 Cleaner upper portion with tool storage and door Gerald L. Melegari 1993-08-10
D334261 Combined vacuum cleaner hose and rack 1993-03-23