| 1957 AMERICAN MACH FOUNDRY Pin Curtain Pinspotter |
| 1965 AMERICAN MACH FOUNDRY Bowling Pin Base Art |
| 1960 AMERICAN MACH FOUNDRY Bowling Pin Removing |
| 1963 AMERICAN MACH FOUNDRY Bowling Pin Spotting Machine |
| 1943 AMERICAN MACH FOUNDRY Pin Setter Bowling Alleys |
| 1954 AMERICAN MACH FOUNDRY Bowling Pin Base Art |
| 1961 AMERICAN MACH FOUNDRY Ball Pin Handling Mechanism |
| 1964 AMERICAN MACH & FOUNDRY Bowling Pin Patent |
| 1961 AMERICAN MACH & FOUNDRY Bowling Pin Patent |
| 1960 AMERICAN MACH FOUNDRY Bowling Pin Spotting |
| 1952 AMERICAN MACH FOUNDRY Bowling Pin Respotter |
| 1963 AMERICAN MACH FOUNDRY Pin Conveying Mechanism |
| 1963 AMERICAN MACH & FOUNDRY Bowling Pin Patent |
| 1941 AMERICAN MACH FOUNDRY Pin Setting Bowling Alleys |
| 1952 AMERICAN MACH FOUNDRY Bowling Pin Holding |
| 1953 AMERICAN MACH FOUNDRY Bowling Pin Respotter |
| 1963 AMERICAN MACH FOUNDRY Plastic Bowling Pin |
| 1964 AMERICAN MACH FOUNDRY Bowling Pin Elevating |
| 1960 AMERICAN MACH FOUNDRY Bowling Pin Setting Machine |
| 1956 AMERICAN MACH & FOUNDRY Bowling Pin Patent |
| 1961 AMERICAN MACH FOUNDRY Bowling Pin Respotting |
| 1965 AMERICAN MACH & FOUNDRY Bowling Pin Patent |
| 1960 AMERICAN MACH FOUNDRY Bowling Pin Respotting |
| 1965 AMERICAN MACH FOUNDRY Bowling Pin Elevating |