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References for project number 40002US Patents:
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- 4,969,018
- 4,912,531
- 4,620,206
- 4,599,728
- 4,589,115
- 4,581,621
- 4,575,924
- 4,532,535
- 4,503,447
- 4,439,782
- 4,393,481
- 4,389,612
- 4,353,081
- 4,313,178
- 4,291,390
- 4,263,664
- 4,051,393
- 3,936,677
- 3,862,436
- 3,833,894
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Foreign Patents: