| 1931 HYLAND Life Boat Launching Apparatus Patent |
| 1933 CHRISTEN Boat Launching Gear Patent Print |
| 1952 LINSMEIER Boat Launching Apparatus Patent |
| 1942 LARSON Boat Launching Device Patent Print |
| 1965 MARTIN Boat Launching Device Patent Print |
| 1925 GEORGE Boat Launching Mechanism Patent |
| 1969 HENRY R OLVERA Boat Launching Dolly Patent |
| 1920 FULLER Boat Launching Apparatus Patent |
| 1922 GEORGE Boat Launching Apparatus Patent |
| 1923 GEORGE Boat Launching Mechanism Patent |
| 1969 OLVERA Boat Launching Dolly Patent Print |
| 1925 GEORGE Boat Launching Apparatus Patent |
| 1967 GERARD Boat Launching Accessory Patent |
| 1962 HURST Boat Launching Apparatus Patent Print |
| 1945 ZORC Boat Launching Trailer Patent Print |
| 1923 ELLISON Boat Launching Device Patent Print |
| 1927 ANTONCICH Boat Launching Device Patent |
| 1924 BLAKE Boat Launching Mechanism Patent Print |
| 1872 QUARITIUS Boat Launching Device Patent 9499 |
| 1927 SORENSEN Boat Launching Device Patent Print |