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Files W.F.F. Archive Patent and Equipment Records Signal Intelligence Service (SIS) Systems, Randomizing Device for Electric Card Sorter, SISDE-23, Serial No. 36,868, US Patent No. 2,166,137, Friedman and Rowlett (18 July 1939), 1935-1939
Amendment to Patent Application # 36,868
Document A67705
132.49 KiB
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Amendment to Patent Application 36,868; SISDE 23
Document A67729
195.57 KiB
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Amendment to Patent Application Serial No. 36,868; SISDE 23
Document A67704
410.51 KiB
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Department of Commerce Re Application # 36,868; SISDE 23
Document A67715
51.15 KiB
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Department of Commerce Response to Amendment of February 1 1937 Re Serial # 36,868; SISDE 23
Document A67710
74.01 KiB
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Description of and Objective of A Randomizer Invention; SISDE 23
Document A67734
327.23 KiB
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Explanation of Electrical Switching Mechanism Invention and Purpose; SISDE 23
Document A67722
368.97 KiB
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Friedman Memo Comments on A Mr Boardman's Unspecified Device; SISDE 23
Document A67717
31.46 KiB
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Friedman Patent Application-Department of Commerce Response to Amendments of May 22 and June 11 1936; SISDE 23
Document A67712
76.26 KiB
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Friedman Patent Application-Record of Military Invention
Document A67719
140.42 KiB
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Friedman Patent Application-Supplement to Amendment Dated May 22 1936 Regarding Serial No. 36,868; SISDE 23
Document A67720
88.04 KiB
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Letter Granting Permission for Friedman/Rowlett to Enter Into Negotiations with Industrial Organizations for Sale of Invention, 21 August 1935; SISDE 23
Document A67786
83.77 KiB
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New Patent Application, System for Randomizing the Relations of Electrical Circuits
Document A67736
40.56 KiB
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Notification of Invention of an Attachment to the Electrical Counting Sorter; SISDE 23
Document A67787
217.11 KiB
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Patent Application Ser. No. 36,868 Electrical Switching Mechanism; SISDE 23
Document A67728
32.06 KiB
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Patent Application, Ser. No. 36,868 Electrical Switching Mechanism; SISDE 23
Document A67730
57.6 KiB
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Randomizer for Electric Card Sorter (SISDE-23), Friedman and Rowlett; Patent No. 2,166,137; SISDE-23
Document A67694
33.53 KiB
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Response to Patent Office Action Dated 23 November 1935; Change of Title of Invention; SISDE 23
Document A67732
238.21 KiB
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