| Patents for Pratt & Whitney Co. |
Patents 181 -
195
of 260
      |
| Number | Date | Patentee | Title | Type |
| 1,273,904 | Jul. 30, 1918 | F. Müller | Tap Making Machine | |
| 1,276,445 | Aug. 20, 1918 | C.H. Taylor | Thread-cutter | lathe tools |
| 1,282,819 | Oct. 29, 1918 | B.M. Hanson | Stop Mechanism for Lathes | metal lathes |
| 1,287,731 | Dec. 17, 1918 | F. Müller | Automatic Grinding Machine | grinders |
| 1,287,732 | Dec. 17, 1918 | F. Müller | Machine for Milling Knurls | embossing and knurling machines |
| 1,299,125 | Apr. 01, 1919 | A.E. Carter | Cutting Tool | lathe tool holders and tool posts |
| 1,299,208 | Apr. 01, 1919 | F. Müller | Relieving Lathe | metal relieving machines |
| 1,318,223 | Oct. 07, 1919 | F. Müller | Lathe Tail-Stock | metal lathe mechanisms |
| 1,323,267 | Dec. 02, 1919 | B.M. Hanson | Precision Boring Machine | vertical boring mills |
| 1,323,268 | Dec. 02, 1919 | B.M. Hanson | Lubricating System | |
| 1,323,276 | Dec. 02, 1919 | F.O. Hoagland | Metal Working Machine and Method | metalworking machines |
| 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 |
