Inventor
Douglas J. Birkholz
Inventor
Madison, WI, US
Overview
Patents· 30 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
LOC09primary
LOC0931%
LOC0813%
LOC1213%
A61BDiagnosis6%
A61FFilters implantable into blood vessels6%
A61NElectrotherapy6%
B26BHand-held cutting tools not otherwise provided for6%
B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers6%
H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines6%
LOC236%
PatentTitleYear
10,500,410Light emitting bone implants2019D0850754Shopping cart shelf2019D0806976'Shopping cart shelf'20188,651,459'Apparatus and method for dispensing fish tape'2014D0676298'Hydraulic driven rotary tool'2013D0581010'Bottle holder'2008D0527602'Retractable saw'20067,028,866'Pressurized plastic bottle for dispensing an aerosol'2006D0501794'Pressure container with actuator overcap'2005D0481935'Pressure container with actuator overcap and dust cover'2003D0470752'Aerosol container with actuator overcap and dust cover'2003D0470753'Aerosol container'2003D0470402'Aerosol container with actuator overcap'2003D0377588'Tool handles'1997D0374597'Utility knife'1996D0373385'Punch tool'1996D0369531'Tool handle'1996D0365005'Scissors'1995D0361705'Scissors'1995D0361700'Tool handle'1995D0360892'Carriage for a rotary blade paper trimmer'1995D0360891'Cap for a rotary paper trimmer carriage'1995D0359427'Pivoted hand tool handle'1995D0354890'5\" scissors'1995D0354423'Scissors'19955,377,412'Softouch scissors'1995D0346542'Rotary cutting tool'1994D0341764'Rotary cutter'1993D0339725'Scissors'1993D0335807'Scissors'1993Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1993–1996Patents assigned to FISKARS AB OY (8)· patent assignee history
1993–2019Based in Madison, WI, US· patent location history
1994–1997Based in De Forest, WI, US· patent location history
1995–1997Patents assigned to FISKARS INC (9)· patent assignee history
1995–1996Based in DeForest, WI, US· patent location history
2003–2008Patents assigned to JOHNSON & SON INC S C (7)· patent assignee history
2003–2006Based in Monona, WI, US· patent location history
2006–2013Patents assigned to GREENLEE TEXTRON INC (2)· patent assignee history
2013–2014Patents assigned to BIRKHOLZ DOUGLAS J (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FISKARS INC | 9 | 1995–1997 |
| FISKARS AB OY | 8 | 1993–1996 |
| JOHNSON & SON INC S C | 7 | 2003–2008 |
| BIRKHOLZ DOUGLAS Jself | 2 | 2013–2014 |
| GREENLEE TEXTRON INC | 2 | 2006–2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Madison, WI, US | 10 | 1993–2019 |
| DeForest, WI, US | 9 | 1995–1996 |
| Monona, WI, US | 6 | 2003–2006 |
| De Forest, WI, US | 5 | 1994–1997 |