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| Withdrawn Patents | |
| Grant Date | Patent Number | 
| 1993-11-23 | D341,524 | 
| 1993-11-23 | 5,263,446 | 
| 1993-11-23 | 5,263,499 | 
| 1993-11-23 | 5,263,961 | 
| 1993-11-23 | 5,263,989 | 
| 1993-11-23 | 5,264,695 | 
| 1993-11-23 | 5,264,977 | 
| 1993-11-23 | 5,264,991 |