| Patents Granted on 1931-??-?? |
Patents 1 -
15
of 628
      |
| Number | Date | Patentee | Title | Type |
| 1,787,432 | Jan. 06, 1931 | D.S. Beattie | Operating Mechanism for Injectors | water injectors |
| 1,787,787 | Jan. 06, 1931 | W.C. Kress | Pipe Vise | pipe and chain vises |
| 1,787,802 | Jan. 06, 1931 | A. Thibault | Hedge trimmer | handheld power tools |
| 1,787,932 | Jan. 06, 1931 | A.F. Breitenstein | Floating Tool Holder | tap and die holders |
| 1,788,046 | Jan. 06, 1931 | C. Booth, G.W. Binns | Roll-End Grinder | grinding machines |
| 1,788,133 | Jan. 06, 1931 | C.J. Travers | Supporting base | |
| 1,788,163 | Jan. 06, 1931 | D.C. Klausmeyer | Index for Machine Tools | metalworking machine mechanisms |
| 1,788,268 | Jan. 06, 1931 | J.E. Anderson | Ejector for taper-shank cutting tools | drill presses |
| 1,788,475 | Jan. 13, 1931 | C.E. Van Norman | Feed mechanism for grinding machines | grinders |
| 1,788,535 | Jan. 13, 1931 | N.F. McNaught, E.H. Peterson | Socket-wrench kit | wrench set holders |
| 1,788,574 | Jan. 13, 1931 | W.G. Hagmaier, E.C. Shaw | Edger | circular ripsaws |
| 1,788,652 | Jan. 13, 1931 | P.E. Butzin, W.K. Andrew | Clamping Device | milling machine accessories |
| 1,788,663 | Jan. 13, 1931 | I.P. De May | Foldable guard for jointer machines | jointers |
| 1,788,761 | Jan. 13, 1931 | H. Ernst | Machine Tool Drive | metalworking power transmission |
| 1,788,918 | Jan. 13, 1931 | D.C. Klausmeyer | Power traverse for radial drill heads | radial drill presses |
