| All Patents in class 280 |
Patents 256 -
270
of 322
      |
| Number | Date | Patentee | Title | Type |
| 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 | |
| 1,648,372 | Nov. 08, 1927 | W.W. Trevor, D.A. Berean | Machine for operating on barrels and the like | cooper |
| 1,658,430 | Feb. 07, 1928 | F.V. Donald | Tractor hitch for lawn mowers | |
| 1,674,813 | Jun. 26, 1928 | I.A. Weaver, G.E. Weaver | Propelling jack | |
| 1,701,107 | Feb. 05, 1929 | R. Hamilton | Drawbar | tractors |
| 1,706,267 | Mar. 19, 1929 | W.D. Van De Mark, G.G. Raymond | Basket-truck | |
| 1,717,384 | Jun. 18, 1929 | G.O. Johnson | Coaster-wagon brake | |
| 1,735,769 | Nov. 12, 1929 | A.W. Manzel | Stabilizer | body and axle parts |
