3271276 | Electrodeposition of quaternary magnetic alloy of iron, nickel, antimony and phosphorus | 1966-09-06 | ||
3130137 | Manufacture of selenium rectifier cell | 1964-04-21 | ||
3023079 | Method for the preparation of selenides and tellurides | 1962-02-27 | ||
2811571 | Thermoelectric generators | 1957-10-29 | ||
2258963 | Production of tellurium | 1941-10-14 |