| 1956 BOFORS AB Depth Charge Launcher Patent |
| 1920 MCCHEYNE GUNN Depth Gage Patent Print Art |
| 1918 MASON Marine Depth Finder Patent 7082 |
| 1956 GUNNAR Depth Charge Launcher Patent Print |
| 1969 LAURIEN Depth Measuring Device Patent Print |
| 1921 ALLEN Depth Control For Submarines Patent |
| 1956 BOFORS AB Depth Charge Launcher Patent |
| 1937 LONGFELLOW Depth Sounding Apparatus Patent |
| 1920 ELECTRIC BOAT CO Depth Gage Patent Print |
| 1968 BULLER Cable Depth Controller Patent Print |
| 1937 WINDSOR HOLLIS Depth Measurement Patent |
| 1946 PATRICK Depth Charge Projector Patent Print |
| 1943 GIMENEZ Submarine Depth Torpedo Patent |
| 1960 STEPHEN Torpedo Depth Control System Patent |
| 1970 BERRY Constant Depth Buoyancy System Patent |
| 1966 JOHNSON Deep Depth Line Charge Patent Print |
| 1973 KLEMAN Depth Control Fishing Lure Patent 24214 |
| 1955 STALEY Variable Depth Motor Mount Patent |
| 1924 LEONIDAS GUILLEMET Depth Bomb Patent Print |
| 1952 PARK Streamline Depth Charge Patent Print |
| 1927 McMILLAN Cement Depth Gauge Patent 6231 |
| 1969 FOHL Depth Controlling Device Patent Print |
| 1950 JASPER Liquid Depth Indicator Patent Print |
| 1952 KETO Torpedo Depth Control System Patent |
| 1956 KARIG Torpedo Depth Control Patent Print |
| 1946 PATRICK Depth Charge Arbor Patent Print Art |
| 1942 BACHERT SR Depth Bomb Patent Print Art |
| 1951 THOMAS Torpedo Depth Control Gear Patent |
| 1962 SARAH Combined Fish Depth Finder Patent 26359 |
| 1960 MILTON Fishing Line Depth Meter Patent |
| 1946 BUSSEY Torpedo Depth Control System Patent |
| 1960 JOHNSON Wide Range Depth Control Patent |
| 1922 BRANHAM Depth Gear For Torpedoes Patent |
| 1957 MORRIS Direct Depth Recorder Patent Print |
| 1968 BAKER BUFORD Depth Controller Patent Print |
| 1945 CAULKINS Depth Charge Projector Patent |
| 1968 TIMOTHY FOHL Depth Controller Patent Print |
| 1970 KING Depth Regulator Fish Lures Patent 24192 |
| 1949 PETERSON Depth Sounder Patent Print Art |
| 1919 STONE Depth Charge Bomb Projector Patent 22428 |
| 1958 WHITEBECK Fishing Depth Water Kite Patent 24107 |
| 1960 PARSE Depth Finder For Fishermen Patent |
| 1922 VITTLEA DEV CORP Torpedo Depth Gear Patent |
| 1949 PETERSON ARTHUR Depth Sounder Patent Print |
| 1947 CHAPIN Depth Control Device Patent Print |
| 1965 HUNTSMAN Depth Recording PRO TECH Patent 26383 |
| 1953 PARK Streamline Depth Charge Patent Print |
| 1961 SCHARFENBERG Depth Meter ELECTRO Patent 26347 |
| 1922 SPERRY Depth Controlled Mine Patent Print |
| 1972 KNUTSON Depth Meter Design VEXILAR Patent 26438 |
| 1922 WILLIAM Torpedo Depth Gear Patent Print Art |
| 1969 CHANCE Streamer Cable Depth Control Patent |