CPC

CPC Class H04N

39 patents in CPC class H04N

39 Patents
0 Views
Updated 2/17/2026

Top Patents

A digital information recording apparatus includes a recording circuit for recording information of a retention period included in the digital information and indicating a period for permitting the digital information to be held in the recording medium, starting with a time at which the digital information is recorded on the recording medium; and information of a playback permission period included in the digital information and indicating a period for permitting the digital information to be played back starting with a time at which the information is reproduced initially following recording of the digital information on the recording medium, permitting temporary recording or copying for the information permitted for “copy never” or “copy one generation.”

Explore More Patents

Discover additional patents in the cpc category

Browse All Patents