US Patent No: 5,347,579

Number of patents in Portfolio can not be more than 2000

Personal computer diary

2 Status Updates

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A computer diary archives a diary entry by creating, time stamping, authenticating and permanently storing a reference data block along with each diary entry. An archived diary entry can only be modified by placing original text within compartment codes, such as cross-out or tear-out codes, and by placing inserted text within insertion codes so that the original diary entry can be recreated from the modified diary entry. The reference data block, which can be the original diary entry, a canonical version of the original diary entry, or a one way fixed length encryption (hash) of the original diary entry, cannot be modified and is used to authenticate the original diary entry. The diary program also monitors text entry for aliases and relative date phrases, and upon detection, prompts the user for entry or enters a specific identifier for each detected alias in an alias compartment or an absolute date for each relative date phrase in an implied date compartment in the diary entry.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
E-CONTACT TECHNOLOGIES LLCAUSTIN, TX4

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Blandford, Robert R Alexandria, VA 4 315

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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UNISYS CORPORATION (1)
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Other [Check patent profile for assignment information] (1)
5,150,407 Secured data storage devices 120 1991

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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Other [Check patent profile for assignment information] (2)
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8,869,293 Method and apparatus for hierarchical assignment of rights to documents and documents having such rights 0 2006