| Patents Granted on 1981-__-__ |
Patents 1 -
15
of 71
      |
| Number | Date | Patentee | Title | Type |
| 4,242,926 | Jan. 06, 1981 | N.T. Anton | Device for sharpening saw chains | chainsaw sharpeners |
| GB-2,051,630 | Jan. 21, 1981 | J. Harman | Indexing Mechanism for a Machine Tool | indexers and dividers |
| 4,246,811 | Jan. 27, 1981 | F.L. Heim, J.R. Bondhus | Ball head polygonal wrench | wrenches |
| 4,246,943 | Jan. 27, 1981 | G.L. Croomeens | Infeed assembly for random length end shaping machines | joint making machines |
| 4,248,115 | Feb. 03, 1981 | R. Kazusky, Jr., J.F. Brodbeck | Sliding table assembly-tilting arbor saws | tablesaw accessories |
| 4,250,551 | Feb. 10, 1981 | R.L. Werdin, L.C. Poehlman, G.E. Paveglio, Jr. | Methods and Apparatus for Lead Segment Machining | nc and cnc apparatus |
| GB-2,053,748 | Feb. 11, 1981 | J. Harman | Locking Device for Indexing Mechanism for a Machine Tool | indexers and dividers |
| GB-2,053,749 | Feb. 11, 1981 | J. Harman | Tool Holders | metalworking machine tool holders |
| 4,250,624 | Feb. 17, 1981 | E.J. Partington | Miter table for use with a saber saw | handheld power tools |
| 4,250,775 | Feb. 17, 1981 | R.M. Ortlieb, R.A. Jerue | Machine tool and method | horizontal boring mills |
| 4,252,038 | Feb. 24, 1981 | O.A. Newton, K. Subramanian | Modified Tool Holder to Prevent Insert Slippage and Fracture | insert tool holders |
| 4,253,351 | Mar. 03, 1981 | H. Allen | Cork extractor | lever cork extractors |
| 4,253,359 | Mar. 03, 1981 | D.H. Youden | Drive System for Multiple Spindle Machine Tool | metalworking power transmission |
| 4,254,895 | Mar. 10, 1981 | E.G. Cheak | Apparatus for automatic alignment and attachment of a doorjamb and stop | specialty woodworking machines |
| 4,255,861 | Mar. 17, 1981 | H. Suwa, K. Nakata | Electrically Digital Display Micrometer | micrometers |
