| All Patents in class 407/89 |
Patents 16 -
30
of 39
      |
| Number | Date | Patentee | Title | Type |
| 1,242,306 | Oct. 09, 1917 | P. Armstrong | Tool Holder | metal shaper tool holders |
| 1,248,201 | Nov. 27, 1917 | C.A. Swahlstedt | Universal Tool Holder | lathe tool holders and tool posts |
| 1,252,040 | Jan. 01, 1918 | M. Schonbrunn | Combination Spring Tool Holder | lathe tool holders and tool posts |
| 1,269,317 | Jun. 11, 1918 | E. Schlegl | Tool Holder | lathe tool holders and tool posts |
| 1,282,984 | Oct. 29, 1918 | W.G. Thompson | Tool Holder | lathe tool holders and tool posts |
| 1,298,201 | Mar. 25, 1919 | M. Hacker | Tool Holder | lathe tool holders and tool posts |
| 1,342,983 | Jun. 08, 1920 | M.J. Breen | Tool Holder | drilling and boring tool holders |
| 1,381,457 | Jun. 14, 1921 | M.H. Derringer | Tool Holder | lathe tool holders and tool posts |
| 1,387,782 | Aug. 16, 1921 | G.F. Krieger | Tool Holder | metal lathe accessories and attachments |
| 1,409,254 | Mar. 14, 1922 | W.J. Smith | Tool Holder | lathe tool holders and tool posts |
| 1,413,490 | Apr. 18, 1922 | F. Pretsch | Tool Holder | metalworking machine tool holders |
| 1,423,245 | Jul. 18, 1922 | J.R. Moore | Tool Holder | metal shaper tool holders |
| 1,935,493 | Nov. 14, 1933 | L.A. Wellington | Tool Holder | drilling and boring tool holders |
| 2,070,188 | Feb. 09, 1937 | T.C. Steward | Lathe Tool Holder | lathe tool holders and tool posts |
| 2,150,959 | Mar. 21, 1939 | R.H. Bergström | Tool Holder | lathe tool holders and tool posts |
