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Your search returned 155 patents.
( 283/85 in Current US Classification ) |
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| 1 2 |
| Patent ID | Title | Date Filed |
| 5060981 | Transparent overlay for protecting a document from tampering
| September 19, 1989 |
| 5018767 | Counterfeit protected document
| January 18, 1989 |
| 1 2 |
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