| Patents for B24B 15 - Machines or devices designed for grinding seat surfaces; Accessories therefor (403) | |
|---|---|
| 01/1977 | |
| 01/04/1977 | US4000584 In-situ lapping apparatus for gate valves |
| 03/1976 | |
| 03/30/1976 | US3946526 Tool for refacing valve seats on faucets or the like |
| 03/09/1976 | US3942289 Flush tank valve seat refacer |