| Patents for Pratt & Whitney Co. |
Patents 241 -
255
of 264
      |
| Number | Date | Patentee | Title | Type |
| 1,611,048 | Dec. 14, 1926 | C. Knowles | Back Rest for Cylindrical Grinders | cylindrical grinders |
| 1,616,136 | Feb. 01, 1927 | E.A. Moyer | Tailstock Clamp | metal lathe accessories and attachments |
| 1,626,953 | May 03, 1927 | F. Müller | Tool Post | lathe tool holders and tool posts |
| 1,632,600 | Jun. 14, 1927 | F.O. Hoagland | Internal Grinding Machine | internal grinders |
| 1,656,347 | Jan. 17, 1928 | J.A. Doane | Sizing Device for Surface Grinders | surface grinders |
| 1,659,247 | Feb. 14, 1928 | J.A. Doane | Full Automatic Thread Hobbing Machine | thread hobbing and thread milling machines |
| 1,664,741 | Apr. 03, 1928 | J.W. Durkee | Relieving Attachment | metal lathe accessories and attachments |
| 1,664,745 | Apr. 03, 1928 | F.O. Hoagland | Fluid Pump | oil pumps |
| 1,669,873 | May 15, 1928 | F.O. Hoagland | Snap Gauge | snap gages |
| 1,674,973 | Jun. 26, 1928 | C.F. Clark, A.L. Kline | Grinding Machine | internal grinders |
| 1,743,604 | Jan. 14, 1930 | F.O. Hoagland | Adapter for Segmental Abrasive Wheels | grinder wheels |
| 1,745,573 | Feb. 04, 1930 | J.J. Harten | Vertical Shaping Machine | metal slotting machines |
| 1,840,361 | Jan. 12, 1932 | F.O. Hoagland | Spindle Rotating Means for Milling Machines | milling machines |
| 1,851,283 | Mar. 29, 1932 | C.G. Johnson | Gauge | special purpose gauges |
| 1,897,666 | Feb. 14, 1933 | F.O. Hoagland | Machine Tool Spindle | metalworking power transmission |
