Typewriters for ciphering or deciphering cryptographic text

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: PHYSICS
Class:: EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
Subclass:: CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY

Filing statistics

IPC G09C 3/00 belongs to the parent subclass G09C, which recorded 7,763 patent applications worldwide between 2013 and 2023. Annual filings declined from 680 in 2013 to 264 in 2023 (-61%), peaking at 951 applications in 2015. The most active applicants in class G09 are SAMSUNG DISPLAY (16,046 applications), BOE TECHNOLOGY GROUP COMPANY (13,766 applications) and BOE TECHNOLOGY GROUP COMPANY (12,804 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

cryptographic TYPEWRITER(S)TYPEWRITER(S) for ciphering or deciphering cryptographic text

2 direct subcodes

Child Classifications

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G09C 3/02 with auxiliary keys or keyboards acting on the original keys or keyboards
G09C 3/04 wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member

Top Applicants

Top 10 applicants by patent filingsfor class G09, 2013–2023, worldwide · Source: EPO PATSTAT

SAMSUNG DISPLAY KR 16,046
BOE TECHNOLOGY GROUP COMPANY 13,766
BOE TECHNOLOGY GROUP COMPANY CN 12,804
LG DISPLAY COMPANY KR 10,322
SAMSUNG ELECTRONICS COMPANY KR 7,738
SAMSUNG DISPLAY 5,172
SEMICONDUCTOR ENERGY LABORATORY COMPANY 4,749
SEMICONDUCTOR ENERGY LABORATORY COMPANY JP 3,417
LG DISPLAY COMPANY 3,335
SONY CORPORATION JP 3,179