| 1988 HARTMAN Petroleum Spillage Tank AMOCO Patent 42513 |
| 1965 HARTMAN Guitar Training Device Patent Print |
| 1966 HARTMAN Feed Transfer Apparatus Patent |
| 1967 RILEY LOHR Gun JOHN H HARTMAN JR Patent |
| 1932 HARTMAN Valving And Sewing Bag Patent Print |
| 1945 HARTMAN Heel Support For Water Skis Patent |
| 1926 HARTMAN HARRY Hog Trough Patent Print Art |
| 1924 HARTMAN JOHN Toy Pistol Patent Print Art |
| 1945 HARTMAN JOHN Water Ski Patent Print Art |
| 1969 LYLE M HARTMAN Piano Harps Patent Print Art |
| 1932 HARTMAN Design Fluid Dispensing WAYNE Patent 49258 |
| 1932 HARTMAN Fluid Dispensing Tool WAYNE Patent 49257 |
| 1931 HARTMAN RUSH Hoisting Truck Patent Print |
| 1967 JOHN H HARTMAN JR Gun Patent Print Art |
| 1959 HARTMAN Method For Making A Pocket Patent |
| 1916 HARTMAN Casing Vending Machine DUPLEX Patent 45407 |
| 1969 HARTMAN LYLE Piano Harps Patent Print Art |
| 1915 HARTMAN Toy Larger Smaller Balls Patent 37395 |
| 1936 HARTMAN ELMER Bulletin Board Patent Print |
| 1927 HARTMAN THOMAS Ball Cover Patent Print Art |
| 1888 HARTMAN Candy Dropping WUNDERLE Patent 19641 |
| 1941 HARTMAN GEORGE Game Board Patent Print Art |
| 1928 HARTMAN Design Bird House Road Marker Patent 49404 |
| 1868 HARTMAN Subsoil Plow Design Patent 12856 |
| 1921 HARTMAN ELLES Airplane Patent Print Art |
| 1898 HARTMAN Blast Furnace Appliance Patent 11608 |
| 1932 HARTMAN Fluid Dispenser WAYNE Patent 42113 |
| 1920 HARTMAN PETER Automobile Horn Patent Print |
| 1922 HARTMAN HARRY Honeycomb Frame Patent Print |
| 1930 SCOTT HARTMAN Bowling Alley Patent Print |
| 1926 HARTMAN THOMAS Shoulder Guard Patent Print |
| 1945 HARTMAN Water Ski Patent Print Art |
| 1921 HARTMAN Pack Of Game Cards COPELAND Patent 6758 |