| Patents for Pratt & Whitney Co. |
Patents 256 -
261
of 261
      |
| Number | Date | Patentee | Title | Type |
| 1,980,336 | Nov. 13, 1934 | F.O. Hoagland | Chuck Retaining Means | metal lathe chucks |
| 2,101,177 | Dec. 07, 1937 | F.O. Hoagland | Bench Type Machine Tool | metal lathe chucks |
| 2,440,916 | May 04, 1948 | J.W. Durkee, J.M. Rusnak | Precision Measuring and Postioning Device | measuring tools |
| 2,991,558 | Jul. 11, 1961 | P. Cherkas | Air Gage Cartridge | pneumatic measuring gauges |
| 2,997,873 | Aug. 29, 1961 | A.M. Dexter, Jr. | Pneumatic Dimension Gage | pneumatic measuring gauges |
| 3,136,561 | Jun. 09, 1964 | J.F. McAuliffe, A.D. Parone | Collet for Fluted Shankless Tool | tool holding collets |
