| 1961 CARL E GREBE Propulsion System Patent Print |
| 1961 HAROLD Marine Propulsion Systems Patent |
| 1961 FOGARTY Underwater Propulsion Swimmers Art |
| 1961 HARRY Depth Charge Having Rocket Motor Propulsion |
| 1961 WHIPPLE Low Speed Marine Propulsion Unit |
| 1961 RICHTER Marine Propulsion Device Patent |
| 1961 Thermostat Powered Propulsion Unit Toy Vehicles |
| 1961 BUCKELEW Chain Propulsion For Boats Patent |
| 1961 THOMPSON RAMO WOOLDRIDGE INC Propulsion System |
| 1961 JOSEPH Jet Propulsion Boats Art Print |
| 1961 REINERS WALTER Ship Propulsion Steering Systems |
| 1961 CURTISS WRIGHT CORP Vehicle Propulsion Mechanism |
| 1961 AEROJET GENERAL CO Jet Propulsion Through Water |
| 1961 MCKINNEY Boat Propulsion Steering Reversing Means |
| 1961 GEORG Ship Propulsion Steering Systems Art |
| 1961 TORREY Outboard Boat Propulsion Unit Patent |
| 1961 PETERSON Vehicle Propulsion Mechanism |
| 1961 TATTER JOHN Propulsion System Patent Print |
| 1961 STARNS Inboard Boat Propulsion Steering Assembly |
| 1961 HAMILTON Marine Propulsion Apparatus Patent |
| 1961 C W F HAMILTON LTD Marine Propulsion Art |
| 1961 CORBETT MARSHALL Propulsion System Patent |
| 1961 RICE WARREN Propulsion System Patent Print |
| 1961 FRITZ Jet Propulsion Through Water Art |
| 1961 NIMMO Propulsion Steering Means Motor Boats |