Inventor
Robert K. Kopras
Inventor
Black Earth, WI, US
Overview
Patents· 17 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
Y10Tprimary
Y10TTechnical subjects covered by former us classification27%
B25FCombination or multi-purpose tools not otherwise provided for21%
B27CPlaning, drilling, milling, turning or universal machines for wood or similar material17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
B23CMilling6%
LOC086%
B24BMachines, devices, or processes for grinding or polishing4%
B27GAccessory machines or apparatus for working wood or similar materials4%
B23BTurning2%
B23DPlaning2%
PatentTitleYear
7,854,054'Attachment for power tool'2010RE040304'Angle attachment for power tool'20087,131,180'Attachment for power tool'20067,094,011'Power tool'20066,926,477'Jig assembly'20056,890,135'Power tool with light emitting diode'20056,854,938'Automatic locking depth guide for cutting tools and the like'2005D0473770'Power tool with automatic locking depth guide'2003D0465712'Power tool with automatic locking depth guide'2002D0465393'Automatic locking depth guide'20026,443,676'Automatic locking depth guide for cutting tools and the like'20026,443,675'Hand-held power tool'20026,048,260'Angle attachment for power tool'20005,902,080'Spiral cutting tool with detachable battery pack'19995,813,805'Spiral cutting tool with detachable handle'19985,323,823'Wood router bit'19945,143,490'Bit for cutting sheetrock'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2003Patents assigned to ROTO ZIP TOOL CORP (9)· patent assignee history
1992–2010Based in Black Earth, WI, US· patent location history
1994Based in Blackearth, WI, US· patent location history
2005–2006Patents assigned to CREDO TECH CORP (5)· patent assignee history
2008Patents assigned to BOSCH GMBH ROBERT (1)· patent assignee history
2010Patents assigned to BOSCH TOOL CORP (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ROTO ZIP TOOL CORP | 9 | 1992–2003 |
| CREDO TECH CORP | 5 | 2005–2006 |
| BOSCH GMBH ROBERT | 1 | 2008 |
| BOSCH TOOL CORP | 1 | 2010 |
Locations
| Location | Patents | Span |
|---|---|---|
| Black Earth, WI, US | 16 | 1992–2010 |
| Blackearth, WI, US | 1 | 1994 |