4090812 - Axial fan with automatically controlled variable pitch blades
4097701 - Coaxial polarity reversing switch with rotary actuation
4129087 - Combination pursuit and compensatory display system
4130466 - Antifouling coating for aluminum structures
4132500 - Controllable and programmable fluid flow modulation system
4140991 - Underwater displacement probe
4152392 - Chemical canister
4154788 - Process for making a plastic antenna reflector
4156155 - Combined rotary electrical contact and shaft seal system
4163135 - High current switches using multi-louvered contact strips
4170244 - Pressure tight valve seat for valves consisting of two opposing tubes
4178143 - Relative orbiting motion by synchronously rotating scroll impellers
4183008 - Noise making device
4184209 - Towed noisemaker
4185578 - Pressure plate mine sweep
4186663 - Transformer movable along power cable
4188822 - Method and apparatus of testing a model
4188906 - Supercavitating propeller with air ventilation
4190012 - Faired tow cable with stubs for strum reduction
4194227 - Vibration isolator and method for manufacturing same
4194246 - Noisemaker beacon
4196629 - Fiber optic machinery performance monitor
4196686 - Surface effect ship internal sidewall drag reduction device
4197200 - Shipboard blackwater physical/chemical treatment system
