US 3933514
Era
era-late-1900s
US 3942875
US Patent 3942875: Wide aperture long focal length lens
US 3942901
US Patent 3942901: Optical sighting instrument with means for…
US 3969912
US Patent 3969912: Patterning memory for circular knitting machine
US 3996865
US Patent 3996865: Shotshell with seed capsule
US 4001247
US Patent 4001247: 1-Ethyl 3a-(substituted-phenyl)…
US 4015906
US Patent 4015906: Method and apparatus for aligning an invisible…
US 4024018
US Patent 4024018: Liquid metal cooled fast breeder nuclear reactors
US 4027494
US Patent 4027494: Low gravity phase separator
US 4035601
US Patent 4035601: Electrical circuit arrangements responsive to…
US 4063883
US Patent 4063883: Manufacture of flame-retardant regenerated…
US 4068461
US Patent 4068461: Digital electronic alarm watch
US 4079688
US Patent 4079688: Displacement hull
US 4100766
US Patent 4100766: Flat knitting machine having four opposed needle…
US 4101823
US Patent 4101823: Method and apparatus for measuring cathode…
US 4134826
US Patent 4134826: Method for producing hydrocarbon fuels from heavy…
US 4138221
US Patent 4138221: Manufacture of pellets from coal conversion…
US 4138222
US Patent 4138222: Pelletization of coal conversion products
US 4169170
US Patent 4169170: Control of dust during coal transportation
US 4197590
US Patent 4197590: Method for dynamically viewing image elements…
US 4227945
US Patent 4227945: Method for preventing decarburization of steel…
US 4236118
US Patent 4236118: Stabilized remote sensing high fidelity apparatus
US 4237224
US Patent 4237224: Process for producing biologically functional…
US 4277785