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239000002923 metal particle Substances 0.000 description 1.


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Google Patents Means for secret transmission of telephonic and radio messagesĭownload PDF Info Publication number US2914613A US2914613A US598652A US59865256A US2914613A US 2914613 A US2914613 A US 2914613A US 598652 A US598652 A US 598652A US 59865256 A US59865256 A US 59865256A US 2914613 A US2914613 A US 2914613A Authority US United States Prior art keywords read transmitter tube receiver message Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2914613A - Means for secret transmission of telephonic and radio messages examine in order to test suitability 16.US2914613A - Means for secret transmission of telephonic and radio messages separate with a riddle, as grain from chaff 13. protect, hide, or conceal from danger or harm 12. a strainer for separating lumps from powdered material or grading particles 9. a door that consists of a frame holding metallic or plastic netting used to allow ventilation and to keep insects from entering a building through the open door 8. a white or silvered surface where pictures can be projected for viewing 7. the display that is electronically created on the surface of the large end of a cathode-ray tube 6. partition consisting of a decorative frame or panel that serves to divide a space 5. a covering that serves to conceal or shelter something 4. a protective covering consisting of netting can be mounted in a frame 3. a protective covering that keeps things out or hinders sight 2.
