Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6415983 | Unique identifier bar code on stamps and apparatus and method for monitoring stamp usage with identifier bar codes | Barbara Lynn Critchley | 2002-07-09 |
| 6398106 | Unique identifier bar code on stamps and apparatus and method for monitoring stamp usage with identifier bars | Barbara Lynn Critchley | 2002-06-04 |