| 1921 LINDQUIST Submarine Destroyer Patent Print |
| 1921 US GOVERNMENT Submarine Mine Patent Print |
| 1921 SUBMARINE SIGNAL CO Submarine Signaling Art |
| 1921 CAHILL THOMAS Submarine Mine Patent Print |
| 1921 GRIESHABER Exhaust System Submarine Vessels |
| 1921 JOHN Submarine Rescue Craft Patent Print |
| 1921 ELECTRIC BOAT CO Exhaust System Submarine Vessels |
| 1921 PAUL C HAYES Submarine Destroyer Patent |
| 1921 LOCKER Submarine Boat Art |
| 1921 ERNEST Submarine Sound Detection Patent |
| 1921 L A SUBMARINE BOAT Depth Control Submarines |
| 1921 HARTFORD EDWARD Submarine Trap Patent Print |
| 1921 LINDQUIST Submarine Salvaging Art Print |
| 1921 GROVE DORSEY Submarine Mine Patent Print |
| 1921 JOSEF Submarine Armor Art |
| 1921 FESSENDEN Submarine Signaling Patent Print |
| 1921 HUDSON Method Mechanism Exploding Submarine Mines |
| 1921 MAYNARD Submarine Grapple Patent Print Art |
| 1921 FULLINWIDER Submarine Mine Patent Print Art |
| 1921 HUDSON Magnetic Firing Mechanism Submarine Mines |
| 1921 JOSEPH B CRAWFORD Submarine Boat Patent |
| 1921 LAKE TORPEDO BOAT Submarine Torpedo Boat |
| 1921 SUBMARINE SALVAGE Submarine Salvaging Art |
| 1921 SUBMARINE SIGNAL CO Diaphragm Mounting Art |
| 1921 SUBMARINE SIGNAL CO Stop Clock Patent Print |
| 1921 JOSEPH Submarine Torpedo Boat Patent Print |
| 1921 MORSE Submarine Propulsion System Patent |
| 1921 MAYNARD ARMOND Submarine Grapple Patent |
| 1921 GABRIEL Submarine Wireless Telegraph Art |
| 1921 NORTON Propulsion Submarine Vessels Art |
| 1921 DEEP WATER SALVAGE DRYDOCK Submarine Dredge |