Question on these as I don't really understand.

> <http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5745902>U.S.
> Patent 5,745,902 Method and system for accessing a file using file
> names having different file name formats
> -
> <http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5579517>U.S.
> Patent 5,579,517 Common name space for long and short filenames
> -
> <http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5758352>U.S.
> Patent 5,758,352 Common name space for long and short filenames
> -
> <http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=6286013>U.S.
> Patent 6,286,013 Method and system for providing a common name space
> for long and short file names in an operating system
>
> There is no patent on the actual technique and data structures used
> to handle/maintain FAT12/16/32 FAT tables (and the DOS standard 8.3
> type file names)
>
> Also, IBM holds a patent for non-DOS extensions in the use of FAT file systems
> <http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5367671>U.S.
> Patent 5,367,671 System for accessing extended object attribute (EA)
> data through file name or EA handle linkages in path tables.

Are these patents on a technique or on the concept?
with a technique we can just do different can't we? just read the patent and
come up with another way to do it.

Or am I completely uninformed?

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