| All Patents in class 280 |
Patents 241 -
255
of 314
      |
| Number | Date | Patentee | Title | Type |
| 1,253,073 | Jan. 08, 1918 | L. Mayer, L.L. Mayer, E.A. Bye | Axle-mount for tractors | tractors |
| 1,271,537 | Jul. 09, 1918 | M.C. Bright | Steering-gear attachment | |
| 1,290,813 | Jan. 07, 1919 | I.A. Weaver | Towing-pole | vehicle mechanic |
| 1,308,537 | Jul. 01, 1919 | I.A. Weaver | Towing device | vehicle mechanic |
| 1,327,654 | Jan. 13, 1920 | C.R. Davis | Fertilizer-distributor | |
| 1,366,413 | Jan. 25, 1921 | F.C. Olin | Tractor | tractors |
| 1,374,513 | Apr. 12, 1921 | W.H. Townsend, J.A. Mosher | Velocipede | bicycles and tricycles |
| 1,388,410 | Aug. 23, 1921 | D.P. Davies | Tractor | tractors |
| 1,431,634 | Oct. 10, 1922 | G. Clements | Adjustable rear support for vacuum cleaners | handheld power blowers |
| 1,453,525 | May 01, 1923 | J. Ross | Adjustable Front Axle | traction engine steering apparatus |
| 1,537,249 | May 12, 1925 | R.E. Manley | Towing pole | vehicle mechanic |
| 1,559,541 | Nov. 03, 1925 | W.I. Ballentine | Trailer for Tractors | tractor trailers |
| 1,591,539 | Jul. 06, 1926 | A. Levedahl | Crank-case venting means for pneumatic tools | |
| 1,599,196 | Sep. 07, 1926 | C.C. Baldwin | Power Propelled Device | harvesters |
| 1,635,803 | Jul. 12, 1927 | H.B. Sperry | Tongue-supporting truck | |
