FR792234A - Enhancements to devices used to encrypt and decrypt messages - Google Patents

Enhancements to devices used to encrypt and decrypt messages

Info

Publication number: FR792234A
Authority: FR; France
Prior art keywords: enhancements; encrypt; devices used; decrypt messages; decrypt
Prior art date: 1934-06-16
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

Other languages

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

International Business Machines Corp

Original Assignee

International Business Machines Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1934-06-16

Filing date

1935-06-14

Publication date

1935-12-26

1935-06-14 Application filed by International Business Machines Corp filed Critical International Business Machines Corp

1935-12-26 Application granted granted Critical

1935-12-26 Publication of FR792234A publication Critical patent/FR792234A/en

Status Expired legal-status Critical Current

Classifications

- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
- G09C3/00—Typewriters for ciphering or deciphering cryptographic text
- G09C3/02—Typewriters for ciphering or deciphering cryptographic text with auxiliary keys or keyboards acting on the original keys or keyboards

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Theoretical Computer Science (AREA)
Lock And Its Accessories (AREA)
Accessory Devices And Overall Control Thereof (AREA)
Printers Characterized By Their Purpose (AREA)
Input From Keyboards Or The Like (AREA)

FR792234D 1934-06-16 1935-06-14 Enhancements to devices used to encrypt and decrypt messages Expired FR792234A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US730905A US2074058A (en)	1934-06-16	1934-06-16	Coding and decoding apparatus

Publications (1)

Publication Number	Publication Date
FR792234A true FR792234A (en)	1935-12-26

Family

ID=24937267

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR792234D Expired FR792234A (en)	1934-06-16	1935-06-14	Enhancements to devices used to encrypt and decrypt messages

Country Status (4)

Country	Link
US (1)	US2074058A (en)
DE (1)	DE664837C (en)
FR (1)	FR792234A (en)
GB (1)	GB452528A (en)

1934
- 1934-06-16 US US730905A patent/US2074058A/en not_active Expired - Lifetime
1935
- 1935-05-17 GB GB14537/35A patent/GB452528A/en not_active Expired
- 1935-06-05 DE DEI52489D patent/DE664837C/en not_active Expired
- 1935-06-14 FR FR792234D patent/FR792234A/en not_active Expired

Also Published As

Publication number	Publication date
GB452528A (en)	1936-08-25
US2074058A (en)	1937-03-16
DE664837C (en)	1938-09-15

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