Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5248359 | Sterile entry/exit total containment process for closed systems using plastic tubes | Dudley W. C. Spencer | 1993-09-28 |
| 5209800 | Total containment welding of plastic tubes | Dudley W. C. Spencer, Robert J. Beird | 1993-05-11 |
| 5158630 | Total containment welding or plastic tubes | Dudley W. C. Spencer | 1992-10-27 |
| 5156701 | Total containment welding of plastic tubes | Dudley W. C. Spencer | 1992-10-20 |
| 5141592 | Sterile entry/exit total containment process for closed systems using plastic tubes | Dudley W. C. Spencer | 1992-08-25 |
| 4933036 | Techniques for welding thermoplastic tubes | Dudley W. C. Spencer | 1990-06-12 |
| 4913756 | Techniques for welding thermoplastic tubes | Dudley W. C. Spencer | 1990-04-03 |
| 4897138 | Sealing of plastic tubes | Dudley W. C. Spencer | 1990-01-30 |
| 4864101 | Hybrid welding wafer | Dudley W. C. Spencer | 1989-09-05 |
| 4832773 | Techniques for welding thermoplastic tubes | Dudley W. C. Spencer | 1989-05-23 |
| 4793880 | Sterile welding of plastic tubes | Dudley W. C. Spencer | 1988-12-27 |
| 4770735 | Techniques for welding thermoplastic tubes | Dudley W. C. Spencer | 1988-09-13 |
| 4753697 | Total-containment sterile process and system | Dudley W. C. Spencer | 1988-06-28 |