| Patents Granted on 1930-05-?? |
Patents 1 -
15
of 39
      |
| Number | Date | Patentee | Title | Type |
| GB-328,475 | May 01, 1930 | H.A. Pearn | Improvements relating to horizontal boring and facing machines | horizontal boring mills |
| GB-328,687 | May 05, 1930 | C.M. Wilcock | Improvements in or Relating to Apparatus for Delivering Measured Quantities of Liquid | measuring apparatus |
| DE-497,052 | May 05, 1930 | n. listed | Machine for Grinding Balls Between Rotating Grinding or Guide Disks in a Threefold Arrangement | grinding machines |
| FR-680,778 | May 06, 1930 | n. listed | Improvements to Grinding Machines | grinding machines |
| 1,756,949 | May 06, 1930 | E.S. McGonegal | Portable Grinding Tool | metal lathe accessories and attachments |
| 1,757,155 | May 06, 1930 | J.J. Witt | Variety lathe | pattern lathes |
| 1,757,452 | May 06, 1930 | A.M. Dellinger | Hammer-mill rotor | grinding mills |
| 1,757,612 | May 06, 1930 | W.D. Archea, G.W. Binns | Centerless Grinding Machinery | grinding machines |
| 1,757,679 | May 06, 1930 | H.L. Myers | Clamping device | sanding machines |
| 1,757,721 | May 06, 1930 | E.R. Klemm, Jr. | Tappet | internal combustion engine valves |
| 1,757,785 | May 06, 1930 | C.E. Sullenberger | 3-wheel bandsaw | bandsaws |
| 1,758,013 | May 13, 1930 | J.E. Caldwell, J.L. Schubert | Adjustable Wrench | screw adjust wrenches |
| 1,758,023 | May 13, 1930 | A. Bjorklund | Lathe | wood lathes |
| 1,758,069 | May 13, 1930 | J.H. Abramson | Bit Extension | drill bit extensions |
| 1,758,080 | May 13, 1930 | E.R. Klemm, Jr. | Governor | internal combustion engine governors |
