Inventor
Robert L. Billings
Inventor
Andover, MA, US
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Fprimary
H01FMagnets38%
G06KGraphical data reading25%
C22CAlloys13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
Y10TTechnical subjects covered by former us classification13%
PatentTitleYear
5,257,000'Circuit elements dependent on core inductance and fabrication thereof'19934,797,541'Power regulator for a contactless credit card system'19894,745,388'Transformer with wire lead isolation slots'19884,692,604'Flexible inductor'19874,187,128'Magnetic devices including amorphous alloys'1980Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1980Patents assigned to BELL TELEPHONE LABOR INC (1)· patent assignee history
1980–1989Based in Andover, MA, US· patent location history
1987–1989Patents assigned to AMERICAN TELEPHONE & TELEGRAPH (3)· patent assignee history
1993Patents assigned to AT & T BELL LAB (1)· patent assignee history
1993Based in Richardson, TX, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| AMERICAN TELEPHONE & TELEGRAPH | 3 | 1987–1989 |
| AT & T BELL LAB | 1 | 1993 |
| BELL TELEPHONE LABOR INC | 1 | 1980 |
Locations
| Location | Patents | Span |
|---|---|---|
| Andover, Massachusetts, US | 4 | 1980–1989 |
| Richardson, Texas, US | 1 | 1993 |