Patent Application Number: 2005218001
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LATEST PRIOR ART
| Date | Title | Reviewer |
|---|---|---|
| 02/24/10 | Knuth, Seminumerical Algorithms | Richard O'Keefe |
| 02/24/10 | DEC-10 Prolog library | Richard O'Keefe |
| 12/10/09 | GNU GMP 2.0.X | Paul Leopardi |
| 12/10/09 | Densely packed decimal encoding | Graham Menhennitt |
DISCUSSION
Paul Leopardi (3 months ago)
I believe that this whole patent was preempted by GNU GMP 2.0 in 1996. I will contact Paul Zimmermann of Inria to ask him to comment.
Paul Leopardi (2 months ago)
Can someone please compare both instances of prior art with the claims and description of the patent application?
I believe that the patent application is identical (or at least sufficiently close) to what is done by GNU GMP 2.0.2, and differs from Densely Packed Decimal Encoding.
Specifically, the description in the patent application talks about doing the usual binary computer arithmetic directly on the stored words, possibly with an extra carry (as per GNU GMP 2.0.2). I don't think that Densely Packed Decimal Encoding allows this. It would either need new hardware (or microcode) for arithmetic, or would need software to convert the packed numbers to a format to allow the usual binary computer arithmetic to be performed. I don't think that this matches the claims, description or inferred intent of the HP patent application.
Mik Clarke (2 months ago)
With regard to the DPD prior art (which is summarized on Wikipedia: http://en.wikipedia.org/wiki/Densely_packed_decimal ) you could argue that the filing is about selecting an appropriate length of DPD based upon the wordsize of the target CPU - useful if your on a server building binary data to be sent to hetrogeneous CPUs. Does seem a bit obvious though - Encode the data for the 8 bit CPU using an 8bit encoding, for the 16 bit using a 16 bit encoding etc... This is basically Claim 1, although they present it as a static choice. Essentially wrapping DPD in a select (wordsize)...PEER TO PATENT ACTIVITY
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United States