Inventor
David L. Wakefield
Inventor
Loves Park, IL, US
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F04Cprimary
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids10%
F16CShafts10%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%
Y10TTechnical subjects covered by former us classification10%
F15BSystems acting by means of fluids in general7%
G01CMeasuring distances, levels or bearings7%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry3%
B64CAeroplanes3%
B64DEquipment for fitting in or to aircraft3%
C03CChemical composition of glasses, glazes or vitreous enamels3%
PatentTitleYear
10,962,059Bearing with an eccentric seal groove202110,858,940Bearing with an asymmetric pressure balance groove202010,578,130Reservoir vent and thermal stabilization orifice20209,404,593'Vent valve'20169,057,372'Gear root geometry for increased carryover volume'20158,771,124'Carrier for planetary gear system'20146,360,446'Level having a laser beam source'20026,211,662'Hand-held hidden object sensor for sensing a location of objects hidden behind a surface of an architectural structure'20016,209,219'Measuring device with housing orientation indicator and position transferring focused light-beam source'20015,544,955'Light weight bearing apparatus and assembly method'19965,526,658'Handcuffs'19965,465,960'Baton with extensible handle and foldable crosshandle'19954,940,607'Method of patching liners of large glass-lined reactors'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1995–1996Patents assigned to HIATT AND COMPANY LTD (2)· patent assignee history
1996Patents assigned to ARGO TECH CORP (1)· patent assignee history
1996Based in Penfield Township, Lorain County, OH, US· patent location history
1996Based in Birmingham, GB· patent location history
2001–2002Patents assigned to STANLEY WORKS (3)· patent assignee history
2001–2002Based in North Branford, CT, US· patent location history
2001Based in North Haven, CT, US· patent location history
2014–2021Patents assigned to HAMILTON SUNDSTRAND CORP (6)· patent assignee history
2014–2015Patents assigned to WAKEFIELD DAVID L (2)· patent assignee history
2014–2021Based in Loves Park, IL, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HAMILTON SUNDSTRAND CORP | 6 | 2014–2021 |
| STANLEY WORKS | 3 | 2001–2002 |
| HIATT AND COMPANY LTD | 2 | 1995–1996 |
| WAKEFIELD DAVID Lself | 2 | 2014–2015 |
| ARGO TECH CORP | 1 | 1996 |
Locations
| Location | Patents | Span |
|---|---|---|
| Loves Park, Illinois, US | 6 | 2014–2021 |
| North Branford, CT, US | 2 | 2001–2002 |
| North Haven, CT, US | 1 | 2001 |
| Penfield Township, Lorain County, OH, US | 1 | 1996 |
| Birmingham, GB | 1 | 1996 |