3
votes
2answers
211 views

Why did IBM buy patent (6,904,428) about an “intranet mediator”?

From what I see, US patent 6,904,428 (by the Illinois Institute of Technology) is a search algorithm process. Any ideas why IBM thought they needed it? An intranet mediator for obtaining direct ...
36
votes
9answers
3k views

Prior art for linked list (secondary and tertiary traversal)?

This is the first I've heard of this patent for linked lists and traversals filed in 2002. Note that the claim is not a patent on a linked list itself (discussion on Hacker News), but apparently on a ...
4
votes
2answers
655 views

Are data structures patentable?

US7028023 seems to be a patent for a data structure (a variation on a linked list with an extra pointer to the item after the next item). Are data structures generally considered patentable, if so, ...
10
votes
5answers
562 views

Patent on comparing two values which are put through a hash function to determine if the same

I came across this patent titled “Similarity-based access control of data in a data processing system” (priority date: 1995-04-11). Abstract: Similarity of data items is determined by analyzing ...
10
votes
3answers
954 views

Prior art for SEO

Patent Application #20120016857 appears to be for Search Engine Optimisation (SEO). Here is its claim 1: A computer-readable medium comprising computer-readable instructions for providing search ...