Matches 451 - 500 out of 544 < 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
2457651 Electron tube and method of making the same  
2453753 Method of manufacturing cathodes of electric discharge tubes  
2425090 Method of making cathodes  
2417730 Electron tube and method of making same  
2393803 Method of making long life secondary electron emitters  
2342550 Method of activating cathodes  
2317754 Method of producing secondary electron emitting cathodes  
2308389 Oxide coated cathode  
2289921 Photosensitive electrode  
2279821 Secondary electron emissive electrode  
2275886 Process of activating cathodes  
2273054 Thermionic gaseous discharge rectifier  
2256341 Photoelectric device and method of manufacture  
2247869 Heater element for cathodes used in radio tubes and method of making the same  
2233276 Secondary electron emissive electrode  
2217448 Cathode  
2214974 Electrode for electric discharge devices  
2214902 Method of producing cathode materials  
2209821 Method of sensitizing foundation members for electric discharge devices  
2208920 Cathode for electron discharge devices  
2205055 Electric discharge device  
2199879 Process for the manufacture of armored electric heating elements  
2192753 Electron discharge device  
2192418 Method of manufacturing photoelectrically sensitive layers  
2185410 Metal compositions  
2180988 Electrode for electric discharge devices  
2162414 Discharge tube electrode  
2159774 Secondary electron emitter and method of making it  
2159755 Method and apparatus for detecting heat  
2149657 Thermionic tube  
2147447 Glow cathode  
2146099 Secondary electron emitter and method of making it  
2144249 Cathode for electron discharge devices  
2142331 Electron emitting cathode  
2140994 Photoelectrically responsive layer  
2128270 Lighting device  
2121637 Electrode for electric discharge devices  
2106753 Electric discharge tube or lamp  
2097157 Electron emitting cathode and method of developing same  
2085605 Thermionic cathode for electric discharge devices  
2084911 Glow lamp electrode and method of manufacture  
2081864 Emissive cathode  
2065570 Electrode structure  
2049811 Vacuum tube with high-emission cathode  
2041802 Electron emitter  
2031102 Photoelectric tube  
2024762 Light sensitive tube  
2019546 Oxide cathode and method of making same  
2016699 Method of producing electron bulbs with high emission cathodes  
2012626 Method of manufacturing photoelectric tubes  
Matches 451 - 500 out of 544 < 1 2 3 4 5 6 7 8 9 10 11 >