| All Patents in class 408 |
Patents 2371 -
2385
of 3521
      |
| Number | Date | Patentee | Title | Type |
| 1,622,209 | Mar. 22, 1927 | C.B. Robinson | Boring and Reaming Tool | tapered reamers |
| 1,622,725 | Mar. 29, 1927 | D.C. Klausmeyer | Arm Mount with Accessible Gear Unit | industrial machine mechanisms |
| 1,628,757 | May 17, 1927 | W.W. Vosper | Ratchet Threading Tool | tap and die holders |
| 1,633,370 | Jun. 21, 1927 | S. Hunter | Door-lock-mortising machine | mortising machines |
| 1,635,179 | Jul. 12, 1927 | R.E. Flanders | Threading Tool | taps and dies |
| 1,635,703 | Jul. 12, 1927 | E.P. Bullard, Jr. | Multiple-Spindle Drilling Machine | |
| 1,638,654 | Aug. 09, 1927 | J.C. Carlton | Radial Drill | radial drill presses |
| 1,641,868 | Sep. 06, 1927 | A.C. Savidge | Valve Seat Reamer | valve reseating tools |
| 1,642,723 | Sep. 20, 1927 | H. de Wallace | Mortising machine | mortising machines |
| 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 |
