| Patents Granted on 1981-05-?? |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 4,265,282 | May 05, 1981 | J.O. Lenz | Tubular rotating cutter | carving machines |
| 4,265,356 | May 05, 1981 | C.G. Glover | Apparatus for Combining Articles from Plural Lanes into a Single Lane | conveyors and hoppers |
| 4,266,120 | May 05, 1981 | R. Johnstone | Unmanned Machining Center With Tool Checking | numerically controlled milling machines |
| CA-1,100,743 | May 12, 1981 | C.B. Sipek, R.B. Clegg, R. Johnstone | Tool storage magazine for a machine tool | tool changers and storage mechanisms |
| 4,266,583 | May 12, 1981 | O.E. Raab, C.E. Kirk | Spindle turning tool | sharpening jigs and fixtures |
| 4,267,495 | May 12, 1981 | B.W. Wilterdink | Machine Speed Controller | machine tool controls |
| 4,267,627 | May 19, 1981 | R. Douglas | Attachment for Valve Spring Depressing Tool | valve spring tools |
| 4,267,671 | May 19, 1981 | R. Rettew | Positioning Of An Abrasive Belt On A Grinding Machine | surface grinders |
| EP-28,945 | May 20, 1981 | W.C. Coate | Automatic Tool Changer for a Lathe | tool changers and storage mechanisms |
