Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5282917 | Method of making a product having a concealed message | — | 1994-02-01 |
| 5028076 | Product having concealed message | — | 1991-07-02 |
| 4972953 | Tamper-evident packaging, method of making same and intermediate therein | Herbert Friedman | 1990-11-27 |