Inventor
William D. Spencer
Inventor
Ellicott City, MD, US
Overview
Patents· 21 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Kprimary
H02KDynamo-electric machines19%
B23DPlaning15%
B27BSaws for wood or similar material15%
B28DWorking stone or stone-like materials15%
Y10TTechnical subjects covered by former us classification15%
H02JElectric power networks7%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems5%
H01RElectrically-conductive connections4%
B25FCombination or multi-purpose tools not otherwise provided for1%
B30BPresses in general1%
PatentTitleYear
10,734,864Brush assembly having multi-piece brush holders for an electric motor, brush holder main piece with flat portions between base piece and brush card mount202010,181,767Brush assembly with brush card mount with brush holders having base and main portion pieces20199,991,706Portable alternating current inverter having reduced imipedance losses20189,923,429'Power tool having improved motor fan assembly'20189,738,010'Tile saw'20179,623,588'Tile saw'20179,344,008'Portable alternating current inverter having reduced impedance losses'20169,166,422'Battery based portable power supply'20159,073,236'Tile saw'20159,044,878'Tile saw'20159,016,180'Tile saw'20158,994,336'Portable alternating current inverter having reduced impedance losses'20158,286,539'Tile saw'20128,001,875'Tile saw'20117,950,315'Tile saw'20117,455,003'Tile saw'20087,328,639'Tile saw'20087,308,844'Tile saw'20077,270,910'Thermal management systems for battery packs'20076,952,996'Remotely operated manhole cover for a tanker'20054,870,898'Trash compactor with pivoting platen portion'1989Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1989–2017Patents assigned to SPENCER WILLIAM D (9)· patent assignee history
1989Based in Brattleboro, VT, US· patent location history
2005Based in Kansas City, MO, US· patent location history
2007–2020Patents assigned to BLACK & DECKER INC (19)· patent assignee history
2007–2020Based in Ellicott City, MD, US· patent location history
2012–2017Patents assigned to CEROLL WARREN A (6)· patent assignee history
2012–2017Patents assigned to CHAIKOWSKY PETER (6)· patent assignee history
2012–2017Patents assigned to MANNARINO FRANK A (6)· patent assignee history
2016–2018Based in Ellicot City, MD, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BLACK & DECKER INC | 19 | 2007–2020 |
| SPENCER WILLIAM Dself | 9 | 1989–2017 |
| CEROLL WARREN A | 6 | 2012–2017 |
| CHAIKOWSKY PETER | 6 | 2012–2017 |
| MANNARINO FRANK A | 6 | 2012–2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Ellicott City, Maryland, US | 17 | 2007–2020 |
| Ellicot City, Maryland, US | 2 | 2016–2018 |
| Kansas City, MO, US | 1 | 2005 |
| Brattleboro, VT, US | 1 | 1989 |