Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4693642 | Line boring apparatus | Alexander C. Mair, Leonhard Allgaier | 1987-09-15 |
| 4645414 | Combined vacuum pump, bearing and seal assembly | James D. Symons | 1987-02-24 |
| 4573690 | Sealing surface and method | James D. Symons | 1986-03-04 |
| 4572516 | Low friction dynamic seal assembly with centrifugal deflection | James D. Symons, Ronald J. Dershem | 1986-02-25 |
| 4553856 | Bearing having nickel-tin-copper barrier layer | John C. Bierlein | 1985-11-19 |