| Patents for Pratt & Whitney Co. |
Patents 196 -
210
of 264
      |
| Number | Date | Patentee | Title | Type |
| 1,323,277 | Dec. 02, 1919 | F. Hoagland | Metal Working machine | metalworking machines |
| 1,323,279 | Dec. 02, 1919 | F.O. Hoagland | Barrel Straightening Mechanism | metal straightening machines |
| 1,323,280 | Dec. 02, 1919 | F.O. Hoagland | Limit Gage | limit gages |
| 1,392,313 | Oct. 04, 1921 | G.S. Fallow | Screw Thread Gage | special purpose gauges |
| 1,405,922 | Feb. 07, 1922 | C. Knowles | Wheel Guard for Grinding Machines | grinding attachments |
| 1,424,764 | Aug. 08, 1922 | C. Knowles | Surface Grinder | surface grinders |
| CA-223,267 | Aug. 29, 1922 | C.H. Taylor | Thread cutter | lathe tools |
| 1,429,614 | Sep. 19, 1922 | F. Müller | Milling Cutter for Gears | milling machine cutters |
| 1,434,699 | Nov. 07, 1922 | F.O. Hoagland | Lead Gauge for Threads | thread gages |
| RE15,625 | Jun. 12, 1923 | C.H. Taylor | Thread-cutter | lathe tools |
| 1,458,633 | Jun. 12, 1923 | P.F. Vokal | Lathe Tool Holder | lathe tool holders and tool posts |
| 1,470,836 | Oct. 16, 1923 | R. Hill | Lead Measuring Machine for Gauges | thread measuring machines |
| 1,472,827 | Nov. 06, 1923 | A.W. Erdman | Cutter Grinding Attachment | grinding attachments |
| 1,480,610 | Jan. 15, 1924 | J. Harten | Gear Cutter | gear cutting tools |
| 1,480,611 | Jan. 15, 1924 | R. Hill | Measuring Machine | |
