| All Patents in class 451/294 |
Patents 46 -
60
of 106
      |
| Number | Date | Patentee | Title | Type |
| 1,424,764 | Aug. 08, 1922 | C. Knowles | Surface Grinder | surface grinders |
| 1,426,492 | Aug. 22, 1922 | G.H. Matthews | Removable cutter head for motor-driven molders | molders |
| 1,445,875 | Feb. 20, 1923 | R.W. Ellingham, C.E. Van Norman | Grinding machine | vehicle mechanic |
| 1,475,153 | Nov. 20, 1923 | H. Athenas | Portable electric combination drill | handheld power drills |
| 1,541,370 | Jun. 09, 1925 | L.T. Medholdt | Setting, grinding, and balancing machine | sharpening machines |
| 1,550,712 | Aug. 25, 1925 | J.A. Smith | Grinding machine | bench or pedestal grinders |
| 1,575,307 | Mar. 02, 1926 | A.B. Bachmann | Flexible-shaft bench grinder | flexible shafts |
| 1,587,865 | Jun. 08, 1926 | F. Schneider | Grinding machine | bench or pedestal grinders |
| 1,679,185 | Jul. 31, 1928 | B.W. Sweet | Screw driver | |
| 1,684,792 | Sep. 18, 1928 | S. Einstein | Grinding Machine Having Balanced Spindle | grinding machines |
| 1,701,912 | Feb. 12, 1929 | R.E. De Walt | Woodworking machinery | jointers |
| 1,742,217 | Jan. 07, 1930 | T.R. Renwick | Woodworking shaper | wood shapers |
| 1,743,134 | Jan. 14, 1930 | W.C. Hammond, H.J. Kingsbury | Motor-driven machine | |
| 1,756,949 | May 06, 1930 | E.S. McGonegal | Portable Grinding Tool | metal lathe accessories and attachments |
| 1,783,019 | Nov. 25, 1930 | A.M. Johnson | Honing machine | honing machines |
