Inventor
John Powers
Inventor
Menlo Park, CA, US
Overview
Patents· 3 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F02Bprimary
F02BInternal-combustion piston engines25%
H02KDynamo-electric machines25%
F16CShafts13%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes13%
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 systems13%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters13%
Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2011Patents assigned to HEWLETT PACKARD DEVELOPMENT CO (1)· patent assignee history
2011Based in Santa Monica, CA, US· patent location history
2021Patents assigned to MAINSPRING ENERGY INC (2)· patent assignee history
2021Patents assigned to ETAGEN INC (1)· patent assignee history
2021Based in Menlo Park, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MAINSPRING ENERGY INC | 2 | 2021 |
| ETAGEN INC | 1 | 2021 |
| HEWLETT PACKARD DEVELOPMENT CO | 1 | 2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| Menlo Park, California, US | 2 | 2021 |
| Santa Monica, California, US | 1 | 2011 |