Inventor
Norman W. Ritchie
Inventor
Blacksburg, VA, US
Overview
Patents· 2 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Cprimary
G01CMeasuring distances, levels or bearings33%
G01DMeasuring not specially adapted for a specific variable33%
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 systems33%
Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2004–2008Patents assigned to BAKER HUGHES INC (2)· patent assignee history
2004Based in Tulsa, OK, US· patent location history
2008Based in Blacksburg, VA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAKER HUGHES INC | 2 | 2004–2008 |
Locations
| Location | Patents | Span |
|---|---|---|
| Blacksburg, Virginia, US | 1 | 2008 |
| Tulsa, OK, US | 1 | 2004 |