| All Patents in class 408 |
Patents 2371 -
2385
of 3503
      |
| Number | Date | Patentee | Title | Type |
| 1,647,396 | Nov. 01, 1927 | A.G. Decker | Rotary tool with key pocket | drill chucks |
| 1,649,060 | Nov. 15, 1927 | A.G. Decker | Portable power-driven rotary tool with spindle latch and hand-operated chuck | handheld power drills |
| 1,650,756 | Nov. 29, 1927 | D.C. Klausmeyer | Spring Suspended Sleeve | metalworking machine mechanisms |
| 1,655,542 | Jan. 10, 1928 | L.S. Hall | Die head for threading machines and the like | pipe threading machines |
| 1,655,563 | Jan. 10, 1928 | A.J. Prance | Thread-cutting die | tapping heads and chucks |
| 1,655,836 | Jan. 10, 1928 | A.H. Hawkinson | Saw Toothed Wood Boring Bit | drill bits |
| 1,658,808 | Feb. 14, 1928 | V. Julien, D.C. Klausmeyer | Drill Column with Coaxial Power Line | metalworking machine mechanisms |
| 1,659,304 | Feb. 14, 1928 | R.L. Rickwood, O.E. Schauer | Split Sleeve Frictional Reverser | metalworking power transmission |
| 1,659,386 | Feb. 14, 1928 | J.J. Van Hamersveld | Tool Holder for Machine Tools | lathe tool holders and tool posts |
| 1,659,978 | Feb. 21, 1928 | D.C. Klausmeyer | Telescopic Guard System for Drills | drill press accessories |
| 1,660,137 | Feb. 21, 1928 | A.M. Sosa, A.E. Robinson | Drilling Machine | radial drill presses |
| 1,660,361 | Feb. 28, 1928 | O. Severson | Boring Head | boring heads |
| 1,660,385 | Feb. 28, 1928 | D.C. Klausmeyer | Strap Guarded Radial Dill | drill press accessories |
| 1,660,386 | Feb. 28, 1928 | D.C. Klausmeyer | Head to Arm Clamping Mechanism | metalworking machine mechanisms |
| 1,660,435 | Feb. 28, 1928 | C.C. Craley | Metal Working Machinery | drill press accessories |
