Inventor
Joel R. Finkel
Inventor
Woodland Hills, CA, US
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Gprimary
G03GElectrography25%
Y10TTechnical subjects covered by former us classification25%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form13%
B42DBooks13%
G06KGraphical data reading13%
G07DHandling of coins or valuable papers, e.g. testing, sorting by denominations, counting, dispensing, changing or depositing13%
PatentTitleYear
4,738,901'Method and apparatus for the prevention of unauthorized copying of documents'19884,678,322'Method and apparatus for the prevention of unauthorized copying of documents'19874,671,839'Secure identification card manufacture'19874,442,541'Methods of and apparatus for sensing the denomination of paper currency'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984Patents assigned to GTE LABORATORIES INC (1)· patent assignee history
1984Based in Wayland, MA, US· patent location history
1987–1988Patents assigned to XEROX CORP (3)· patent assignee history
1987–1988Based in Woodland Hills, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| XEROX CORP | 3 | 1987–1988 |
| GTE LABORATORIES INC | 1 | 1984 |
Locations
| Location | Patents | Span |
|---|---|---|
| Woodland Hills, California, US | 3 | 1987–1988 |
| Wayland, Massachusetts, US | 1 | 1984 |