| 1926 HAROLD Nonclogging Feed Device Patent Print |
| 1963 HAROLD Bird Feeding Device Patent Print Art |
| 1925 CALDWELL HAROLD Trundling Device Patent |
| 1932 HAROLD PICKARD Amusement Device Patent |
| 1945 HAROLD Safety Device For Firearms Patent |
| 1943 BALDWIN HAROLD Traction Device Patent Print |
| 1957 HAROLD Missile Firing Trainer Device Patent |
| 1935 HAROLD DAHLBERG Diving Device Patent Print |
| 1920 HAROLD BUCHANAN Coaling Device Patent Print |
| 1929 PITCAIRN HAROLD Aircraft Device Patent |
| 1934 HUNT HAROLD Amusement Device Patent Print |
| 1962 PITTS HAROLD Game Device Patent Print Art |
| 1947 DAVIDSON HAROLD Salvage Device Patent Print |
| 1922 HAROLD PICKARD Traction Device Patent Print |
| 1947 AUSTIN HAROLD Amusement Device Patent Print |
| 1935 HAROLD Circuit Closing Device Patent Print |
| 1920 CASE HAROLD Stock Feeding Device Patent |
| 1958 BRESLAU HAROLD Supporting Device Patent |
| 1927 HAROLD Safety Device For Automobiles Patent |
| 1923 HAROLD STOEHRER Amusement Device Patent |
| 1929 PULSIFER HAROLD Amusement Device Patent |