P
PatentIndex
Search
Landscape
Sign in
Inventor
SHIMIZU MAYUKO
JP
2 patents
Patents
2 patents
US6157720A
Dec 5, 2000
Method and apparatus for encrypting data
HITACHI LTD
51 citations
94
US6504931B1
Jan 7, 2003
Method and apparatus for encrypting data
HITACHI LTD
10 citations
71