| Patents for none listed |
Patents 1186 -
1200
of 3298
      |
| Number | Date | Patentee | Title | Type |
| DE-517,257 | Feb. 03, 1931 | n. listed | Machine for Grinding Balls Using Two Cylindrical Grinding or Guide Disks | grinding machines |
| 1,791,681 | Feb. 10, 1931 | P.V. Morgan | Device for Removing Tire Shoes from Drop Center Rims | metal tire repair tools |
| 1,791,771 | Feb. 10, 1931 | R.J. Velepec | Screw Driver | screwdrivers |
| 1,791,969 | Feb. 10, 1931 | H.D. Murray | Gas Engine | gas and gasoline engines |
| 1,792,043 | Feb. 10, 1931 | L. Scusa | Indicator Gauge | measurement gauges |
| 1,792,338 | Feb. 10, 1931 | F. Walz | Adjustable Wrench | quick adjust wrenches |
| DE-517,148 | Feb. 12, 1931 | n. listed | Process for centerless grinding of rolls with a concave or convex surface line as well as for chamfering cylindrical rolls | cylindrical grinders |
| DE-518,155 | Feb. 13, 1931 | n. listed | Machine for Grinding Balls by Means of Two Cylindrical Grinding or Guide Discs | cylindrical grinders |
| FR-699,351 | Feb. 13, 1931 | n. listed | Improvements to Grinding Machines | grinding machines |
| FR-699,483 | Feb. 16, 1931 | n. listed | Improvements to Grinding or Grinding Machines | grinding machines |
| 1,793,112 | Feb. 17, 1931 | F. McMahon | Angle Plate | angle bars and angle plates |
| 1,793,714 | Feb. 24, 1931 | E. Newberg | Duplex Wrench | nut wrenches |
| 1,794,340 | Feb. 24, 1931 | M.K. Parkhurst | Optical Measuring Device | measurement gauges |
| 1,794,361 | Mar. 03, 1931 | L.F. Nenninger, B.P. Graves, E.J. Kearney, J.B. Armitage | Milling-Machine Spindle and Tool | milling machine tools |
| 1,797,121 | Mar. 17, 1931 | F.J. Bohn | Micrometer Gage for Internal Threads | micrometers |
