Inventor
KATSURA TAKASHI
JP14 patents
⚠️ This page may combine multiple inventors who share the name “KATSURA TAKASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD
13 patentsUS6477276B1Nov 5, 2002
Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD101 citations96
US6693965B1Feb 17, 2004
Apparatus for and method of embedding and extracting digital information, and medium having program for carrying out the method recorded thereon
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD50 citations92
US7356700B2Apr 8, 2008
Digital watermark-embedding apparatus and method, digital watermark-detecting apparatus and method, and recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD51 citations91
US6898297B2May 24, 2005
Digital watermark embedding method, digital watermark extracting method, recording medium, image recording device, and image replaying device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD36 citations89
US7003666B1Feb 21, 2006
Apparatus and method for embedding information for tamper detection and detecting tamper and recording medium having program for carrying out the method recorded thereon
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD15 citations84
US6639997B1Oct 28, 2003
Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations84
US7315621B2Jan 1, 2008
Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations83
US7127614B2Oct 24, 2006
Justification authenticating system, personal certificate issuing system, and personal certificate
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations82
US7142692B2Nov 28, 2006
Reproduction equipment, reproduction equipment specifying equipment, reproduction equipment specifying system and methods and recording media for said equipment and system
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations73
US6788821B2Sep 7, 2004
Digital information embedding/extracting apparatus and method, and medium including a program for executing the method recorded thereon
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations73
US6728409B2Apr 27, 2004
Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations73
US7187782B2Mar 6, 2007
Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium having recoded therein a program for performing the digital watermark-embedding method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations62
US4600862AJul 15, 1986
Discharge lamp operation apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations61