| 1936 ROBINSON HAROLD Trailer Vehicle Patent |
| 1967 PRATT HAROLD Double Hulled Ship Patent |
| 1961 HAROLD Lashing Hook Patent Print Art |
| 1944 TREGILGAS HAROLD Life Preserver Patent |
| 1937 HAROLD D GREGORY Outboard Motor Patent |
| 1951 HAROLD SWANSON Farm Utility Boat Patent |
| 1941 HAROLD Multineedle Sewing Machine Patent |
| 1947 PIERCE HAROLD Boxed Produce Load Patent |
| 1960 HAROLD Power Transmission Systems Patent |
| 1936 ABKOWITZ HAROLD Mine Car Patent Print Art |
| 1947 HAROLD Antiglare Rear View Mirror Patent |
| 1964 RIETH HAROLD Transducing System Patent |
| 1964 HAROLD MOUIGAL Variable Gear Game Patent |
| 1939 CRUM HAROLD Airship Mooring Patent Print |
| 1939 HOEKSTRA HAROLD Airplane Control Patent |
| 1958 HAROLD Power Transmission Systems Patent |
| 1964 WALKER HAROLD Submarine Vehicle Patent |
| 1966 RIETH HAROLD Photoelectric Organ Patent |
| 1968 RIETH HAROLD Remote Control Unit Patent |
| 1943 HENRICKS HAROLD Sliding Car Door Patent |