| Patents for Frank Spalding |
Patents 1 -
15
of 19
      |
| Number | Date | Patentee | Title | Type |
| 495,915 | Apr. 18, 1893 | F. Spalding | Micrometer Gage | micrometers |
| 557,445 | Mar. 31, 1896 | F. Spalding | Micrometer Gage | micrometers |
| 591,363 | Oct. 05, 1897 | F. Spalding | Calipers | calipers |
| 597,335 | Jan. 11, 1898 | F. Spalding | Micrometer Depth Gage | micrometer depth gauges |
| 626,876 | Jun. 13, 1899 | E.C. Thurston, F. Spalding | Micrometer Calipers | micrometers |
| 645,838 | Mar. 20, 1900 | F. Spalding | Micrometer Gage | micrometers |
| 664,978 | Jan. 01, 1901 | F. Spalding | Micrometer Gage | micrometers |
| 676,637 | Jun. 18, 1901 | F. Spalding | Micrometer Caliper | micrometers |
| 729,970 | Jun. 02, 1903 | F. Spalding | Micrometer Calipers | micrometers |
| 761,328 | May 31, 1904 | F. Spalding | Micrometer Calipers | micrometers |
| 763,076 | Jun. 21, 1904 | F. Spalding | Depth Gage | micrometer depth gauges |
| 769,196 | Sep. 06, 1904 | F. Spalding | Combination Tool | try squares |
| 790,665 | May 23, 1905 | F. Spalding | Micrometer Calipers | micrometers |
| 796,612 | Aug. 08, 1905 | F. Spalding | Screw Gage | thread gages |
| 842,263 | Jan. 29, 1907 | F. Spalding | Micrometer Calipers | inside micrometers |
