Files W.F.F. Archive Patent and Equipment Records Patent File, SIGABA Signals Intelligence Service (SIS) Systems, M-134-T2 (SISDE-7), Serial No. 682,096, 1933-1941
Alleged Combination In Which One Element Is Novel
Appeal from the Principal Examiner to the Board of Appeals; Serial: 682,096
Comments on Patent Examiners Report
Continuance of Patent Application 682,096, Cryptographic System
Converter M-134-T2 Wiring and Instruction Book Diagrams
Corrections to Patent Application
Description of A Cryptographic Invention
Final Rejection for Patent Application 682,096
Folder Cover for Patent Papers on Converter M134-T2
Modification In the Navy Cipher Machine
New Patent Application, Cryptographic System (Improvement on Serial No. 588,344)
Patent Application for Cryptographic System
Patent Application No. 682,096-William F. Friedman-Cryptographic System
Patent Application Serial No. 682,096-Cryptographic System
Patent Application, Ser. No. 682,096, Filed July 25, 1933 Improvement In Cryptographic System
Patent Assignment: Serial No. 682,096
Rejection of Claims for Patent Application 682,096
Response to Amendment for Patent Application 682,096
Response to Amendment for Patent Application 682,096
Response to Patent Application 682,096 for Cryptographic System
Response to Patent Application 682,096-Cryptographic System
Wire Diagram for Key Tape Transmitter