| 1967 ROBERT Automatic Propeller Pitch Control Adaptor |
| 1942 ASHELMAN Automatic Adjustable Propeller Art |
| 1929 CASEY Automatic Feathering Propeller Patent |
| 1961 COLEMAN Automatic Variable Pitch Propeller |
| 1934 HAVILL Automatic Propeller Patent Print Art |
| 1945 RAY Automatic Propeller Pitch Control Art |
| 1934 KELM Automatic Variable Pitch Propeller Art |
| 1935 REED Automatic Variable Pitch Propeller Art |
| 1935 TAYLOR Automatic Variable Pitch Propeller |
| 1945 MOLLENHAUER Automatic Area Control Propeller |
| 1952 MUMA Automatic Propeller Feathering System |
| 1953 FOSS Automatic Variable Pitch Propeller Art |
| 1936 ZELIE Automatic Variable Pitch Propeller |
| 1938 BOYD Automatic Variable Pitch Propeller Art |
| 1938 JOHN SQUIRES Automatic Propeller Patent |
| 1936 AXEL NELSON Automatic Change Pitch Propeller |
| 1949 LAMPTON Automatic Propeller Blade Support |
| 1951 MORELOCK Automatic Pitch Change Propeller |
| 1949 MOUNT Automatic Adjustable Pitch Propeller |
| 1938 LILLEY Automatic Variable Pitch Propeller |
| 1942 OUTBOARD MARINE Automatic Adjustable Propeller |
| 1934 LAMBERT Automatic Variable Pitch Propeller |
| 1936 CHARLES Automatic Change Pitch Propeller |
| 1933 WILLIAM Automatic Variable Pitch Propeller |
| 1949 UNITED AIRCRAFT CORP Automatic Propeller |
| 1934 ECLIPSE AVIAT CORP Automatic Propeller Art |
| 1936 WILLIAM Automatic Variable Pitch Propeller |
| 1934 ZEUS Automatic Altitude Propeller Patent |
| 1949 LAMPTON Automatic Propeller Patent Print |
| 1921 NIELSEN Automatic Propeller Governor Boats |
| 1970 PHILLIPS ADRIAN Automatic Variable Pitch Propeller |
| 1954 EVANS Automatic Variable Pitch Propeller |
| 1934 ECLIPSE AVIAT CORP Automatic Altitude Propeller |
| 1939 STEPHENS Automatic Variable Pitch Propeller |
| 1936 GEMENY Automatic Variable Pitch Propeller |
| 1965 BROWN Automatic Variable Pitch Propeller |
| 1933 LAMBERT Automatic Variable Pitch Propeller |
| 1970 PHILLIPS Automatic Variable Pitch Propeller |
| 1934 WILLIAM Automatic Variable Pitch Propeller |
| 1934 HARRISON Automatic Variable Pitch Propeller |