| Patents for Pratt & Whitney Co. |
Patents 91 -
105
of 261
      |
| Number | Date | Patentee | Title | Type |
| 588,056 | Aug. 10, 1897 | F.G. Echols | Screw Cutting Tool | |
| 588,222 | Aug. 17, 1897 | F.G. Echols | Tool Holder | lathe tool holders and tool posts |
| 608,854 | Aug. 09, 1898 | L.E. Harper, C.L. Grohmann | Ball-bearing | industrial machine bearings |
| 616,851 | Dec. 27, 1898 | F.E. Thompson | Weighing Machine | scales and balances |
| 616,852 | Dec. 27, 1898 | J. Christiansen | Weighing Machine | scales and balances |
| 627,299 | Jun. 20, 1899 | F.G. Echols | Metal-working machine | milling machines |
| 627,529 | Jun. 27, 1899 | G.E. Randles | Screw Machine | screw machines |
| 628,730 | Jul. 11, 1899 | F. Harrington, A. Whitney | Work Holder for Lathe Spindles | metal lathe chucks |
| 644,279 | Feb. 27, 1900 | F. Harrington, E.M. Couch | FeedAttachment for Screw or Analogous Machines | screw machines |
| 644,310 | Feb. 27, 1900 | F. Harrington, L.C. Woerner | Multiple Spindle Screw Machine | screw machines |
| 659,962 | Oct. 16, 1900 | C.L. Goodrich | Turret-tool | |
| 662,900 | Nov. 27, 1900 | C.L. Goodrich, A.F. Kummel | Chuck Operated Device | metal lathe accessories and attachments |
| 666,695 | Jan. 29, 1901 | J.B. Renshaw | Ratchet Drill | ratchet drills |
| 688,515 | Dec. 10, 1901 | B.M. Hanson | Metal Working Machine | milling machines |
| 698,008 | Apr. 22, 1902 | F.W. Gordon | Change Gearing | engine lathes |
