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| Withdrawn Patents | |
| Grant Date | Patent Number | 
| 1993-08-31 | D338,979 | 
| 1993-08-31 | 5,239,857 | 
| 1993-08-31 | 5,239,910 | 
| 1993-08-31 | 5,240,248 | 
| 1993-08-31 | 5,240,281 | 
| 1993-08-31 | 5,240,676 | 
| 1993-08-31 | 5,240,716 | 
| 1993-08-31 | 5,240,820 | 
| 1993-08-31 | 5,240,830 | 
| 1993-08-31 | 5,240,852 | 
| 1993-08-31 | 5,240,931 | 
| 1993-08-31 | 5,240,987 | 
| 1993-08-31 | 5,241,123 | 
| 1993-08-31 | 5,241,311 | 
| 1993-08-31 | 5,241,532 | 
| 1993-08-31 | 5,241,585 |