| 1966 Convertible Rail Highway Vehicle Patent |
| 1951 POGREBA LEO Highway Toy Patent Print Art |
| 1922 COOKE Ornamental Design Highway Sign Patent 49519 |
| 1936 ERNEST Rail Highway Vehicle Patent Print |
| 1932 MACDONALD DILLEY Highway Gate Patent Print |
| 1966 BROWNE Railway Highway Vehicle Truck Patent |
| 1931 SORENSEN Highway Crossing Signal Patent |
| 1935 HIGHWAY TRAILER CO Body Lock Patent Print |
| 1929 HIGHWAY TRAILER CO Rocking Dump Body Patent |
| 1966 LAWLOR Highway Signal Flare Design Patent 21011 |
| 1944 STEPHENSON Highway Crossing Gate Patent |
| 1931 HEYES Highway Crossing Protection Patent |
| 1964 ACKLEY JOHN Highway Sprayer Patent Print |
| 1930 MCCANN Highway Crossing Signal Patent Print |
| 1922 ROGERS Illuminated Highway Guidepost Patent 49511 |
| 1931 FISHER Design Highway Crossing Signal Patent 49299 |
| 1936 HIGHWAY TRAILER CO Body Lock Patent Print |
| 1941 THOMAS RORER Toy Highway Patent Print Art |
| 1972 KERNAN Holder Highway Flares Patent 21038 |
| 1965 SCHEG Highway Crossing Warning Lamp Patent |
| 1934 HENRY Highway Crossing Signal System Patent |
| 1931 JANSSEN Design Highway Sign TEXTILE Patent 49291 |
| 1932 STRAUSS Highway Bridge Pier Design Patent 26083 |
| 1929 HIGHWAY TRAILER CO Dumping Vehicle Patent |
| 1926 HIGHWAY TRAILER CO Covered Dump Body Patent |
| 1936 HUGH ADAIR Highway Rail Vehicle Patent |
| 1940 RONK Railway And Highway Trailer Patent |
| 1938 SIMPSON THORNTON Highway Signal Patent |
| 1958 FRANK Highway Trailer Carrying Car Patent |
| 1924 RICHARDS Highway Crossing Signal Patent |
| 1928 ARTHUR Highway Crossing Gate Patent Print |
| 1931 MOCK Highway Crossing Signal Patent Print |
| 1930 HIGHWAY TRAILER CO Dump Body Vehicle Patent |
| 1929 HIGHWAY TRAILER CO Tilting Body Lock Patent |
| 1931 DAN HARSTON Highway Foot Cycle Patent Print |
| 1929 DANIEL HEWITT Highway Signal Patent Print |
| 1933 HOWARD Highway Crossing Signal Patent Print |
| 1932 SPRAY Highway Crossing Protection Patent |
| 1973 OLSON Rail Highway Vehicle NELSON Patent 48155 |
| 1921 TENNY Design Highway Advertising Sign Patent 49541 |
| 1920 OSCAR Highway Crossing Signal Patent Print |
| 1920 MCMULLAN Highway Guide Tool HICKEY Patent 49651 |
| 1926 GRAVES Highway Crossing Signal Patent Print |
| 1921 MEDEN Design Highway Signal AMERICAN Patent 49559 |
| 1943 STEPHENSON Highway Crossing Gate Patent |
| 1931 PETTIBONE JAMES Toy Highway Patent Print |
| 1930 HEINRICH Highway Crossing Barrier Patent |
| TONKA State Highway Dragline TRUCK US Patent |