| |
|
Inventor: Gordon; Douglas C.
Address: Kinburn, CA
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4891666 |
Copy indicator for a document |
January 2, 1990 |
| A printed background pattern for a document is described, wherein the pattern masks a copy indicator which is revealed upon making a copy of the pattern using a digital optical scanning means. The background pattern comprises an area of microprinting with a type size having a line re |
|
|
|
