for correcting texts by removing incorrect lines from one film and splicing-in corrected lines from another film

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Auxiliary devices for modifying, mixing, or correcting text or layout in connection with photographic or photoelectronic composing > for correcting texts by removing incorrect lines from one film and splicing-in corrected lines from another film

CPC:

Auxiliary devices for modifying, mixing or correcting text or layout in connection with photographic or photoelectronic composing > for correcting texts by removing incorrect lines from one film and splicing-in corrected lines from another film

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

Class B41,2013–2023, worldwide · Source: EPO PATSTAT

SEIKO EPSON CORPORATION 14,672
CANON 14,153
RICOH COMPANY 8,049
SEIKO EPSON CORPORATION JP 8,044
HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,312
BROTHER INDUSTRIES 6,887
KYOCERA DOCUMENT SOLUTIONS 5,463
CANON JP 5,001
KONICA MINOLTA CORPORATION 4,512
BROTHER INDUSTRIES JP 3,681

Top Applicants (CPC)

Class B41,2013–2023, worldwide · Source: EPO PATSTAT

SEIKO EPSON CORPORATION 8,446
SEIKO EPSON CORPORATION JP 8,438
HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,828
CANON JP 5,419
CANON 4,156
BROTHER INDUSTRIES JP 3,763
BROTHER INDUSTRIES 2,779
RICOH COMPANY JP 2,717
FUJIFILM JP 2,423
RICOH COMPANY 1,739