| Patents for Pratt & Whitney Co. |
Patents 241 -
255
of 260
      |
| Number | Date | Patentee | Title | Type |
| 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 |
| 1,904,395 | Apr. 18, 1933 | A.G. Whitehead | Spindle Bearing | metalworking machine bearings |
| 1,918,952 | Jul. 18, 1933 | W. Krause, A.B. Bachmann | Flexible Shaft Bench Grinder | grinders |
| 1,961,605 | Jun. 05, 1934 | J.E. Lovely, N.I. Lundberg, M.E. Lange, F.O. Hoagland, A.E. Drissner | Standard Spindle Nose | metal lathe chucks |
| 1,980,336 | Nov. 13, 1934 | F.O. Hoagland | Chuck Retaining Means | metal lathe chucks |
