Inventor
Robert L. Rutledge
Inventor
St. Paul, MN, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Cprimary
G03CPhotosensitive materials for photographic purposes43%
F21SNon-portable lighting devices14%
F21VFunctional features or details of lighting devices or systems thereof14%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests14%
Y10TTechnical subjects covered by former us classification14%
PatentTitleYear
4,974,137'High intensity indirect lighting fixture'19904,390,612'Colloid relief images formed by oxidized developer transfer'19834,363,864'Colloid relief images by oxidized developer transfer'19824,226,927'Photographic speed transfer element with oxidized polyethylene stripping layer'1980Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1980–1983Patents assigned to MINNESOTA MINING & MFG (3)· patent assignee history
1980–1983Based in St. Paul, MN, US· patent location history
1990Patents assigned to LAM LIGHTING SYSTEMS (1)· patent assignee history
1990Based in Wakefield, MA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MINNESOTA MINING & MFG | 3 | 1980–1983 |
| LAM LIGHTING SYSTEMS | 1 | 1990 |
Locations
| Location | Patents | Span |
|---|---|---|
| St. Paul, Minnesota, US | 3 | 1980–1983 |
| Wakefield, Massachusetts, US | 1 | 1990 |