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Files W.F.F. Archive Patent and Equipment Records Patent Data SISDE-14, Systems and Means for Enciphering and Deciphering Magnetically Recorded Signals, 1932-1937
Comments by Captain Miller and Friedman on Invention and Recommendation for Patent Application Filing; Query from Signal Corps, R&D to Miller and Friedman and Response
Document A105059
54.03 KiB
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Comments by Signal Corps Laboratories, Fort Monmouth, NJ on Invention by Captain Miller and Mr. Wm. Friedman; Includes Margin Comment
Document A105062
61.84 KiB
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Cover Memo for Description of System for Automatic Sorting of Documents; Memo from William Friedman to Signal Corps, R&D Division
Document A105043
41.85 KiB
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Engineering Report No. 20-Investigation of Telegraphone AS A Means for Introducing A Time Delay In A Signal Network; Originated by Signal Corps Laboratories, Fort Monmouth, NJ
Document A105027
624.48 KiB
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Joint Invention of A System and Means for Enciphering and Deciphering Magnetically-Recorded Signals
Document A105040
36.31 KiB
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Joint Invention of A System and Means for Enciphering and Deciphering Magnetically-Recorded Signals
Document A105077
110.25 KiB
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Letters Between Major Ranger, President of Rangertone, Inc., and William Friedman Regarding Tests of Tape Recordings
Document A105053
243.83 KiB
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Magnetically Recorded Signals; Letter from Signal Corps Laboratories Concerning Invention of Captain Miller and William Friedman
Document A105070
117.74 KiB
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Means of Securing Secrecy In Voice Communications; Letter from Captain Miller, Signal Corps, Concerning His and William Friedman's Work
Document A105042
63.79 KiB
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Note from William Friedman Discussing Old Records; Notes Between William Friedman and Mr. Mathews, R&D
Document A105034
44.57 KiB
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Proposed Modification to Friedman & Miller's Magnetic Tape Recording Invention; Draft Memo to Chief Signal Officer Regarding Patent Application
Document A105075
168.69 KiB
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Request for Comments on Invention by Captain Miller and Wm. Friedman-System and Means for Enciphering and Deciphering Magnetically Recorded Signals; Memo and Schematics from Signal Corps, Washington to Signal Corps Laboratories, Fort Monmouth, NJ and Reply
Document A105039
204.73 KiB
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Request for Resubmission of Invention to Signal Corps Patent Board; Memo from William Friedman and Captain Miller
Document A105036
76.65 KiB
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Schematic Representation of "System And Means For Enciphering And Deciphering Magnetically Recorded Signals"; Invented by: William F Friedman, Harold Miller
Document A4161576
378.66 KiB
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Signal Corps Patent Board Reconsideration of Proposal by Friedman and Miller; Finding on Proposal for System for Enciphering and Deciphering Magnetically-Recorded Signals
Document A105055
186.08 KiB
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Sound Recording on Magnetic Tape; Article by C.N. Hickman In Bell System Technical Journal, April 1937
Document A105054
465.72 KiB
PDF
System and Means for Enciphering and Deciphering Magnetically Recorded Signals; Memo and Two Sketches of the System Invented by Captain Miller and William F. Friedman
Document A105066
91.29 KiB
PDF
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