The JAPIO site used to get its data from the free side of the
US PTO's (Patent Trademark Office) ftp site.  Specifically, they

    ftp ftp.uspto.gov (63.71.228.67)
    anonymous
    password = ident (Is this some special password??)
    cd pub/patdata/2001
    bin
    get 01week13

---------------------------------------------------------------------
  This is Delphion's FTP info.  On 10-9-2001, the userid and password
got changed.  It used to be ibm13cor/luc13pho (as in luc(ky) 13 fish).

    ftp www3.uspto.gov (63.71.228.68)
    del13ion
    password = reb69sol
    cd /grb
    bin
    get pg01MMDD.zip   (eg, get pg010403.zip)

---------------------------------------------------------------------
  This page from the US PTO site suggested that in order to best
view special characters, change your default fonts.  See

http://www.uspto.gov/ebc/efs/solutions/iefonts.htm

Under Internet Explorer, go to
  Tools
  Internet Options
  Font Button  (at the bottom of the screen)

Change "Language script" to "Latin Based" (it probably is already that)
       "Web Page Font" to "Lucida Sans Unicode"
       "Plain Text Font" to "Lucida Console"

---------------------------------------------------------------------
  This page from the US PTO site has some info on the character
mappings of special characters.

http://www.uspto.gov/ebc/efs/unicode/charentities.htm

Red Book    Green Book
========  ==============
≡   .ident.
∂    .differential.
°     .degree.
≈      .apprxeq.
          .lambda.


  The rbV24sgml2gb.pl program inserts .Iadd. and .Iaddend. into 
<INS-S(tart) and <INS-E(nd) paragraph tabs (e.g. PDAT, CUSTOM_CHARACTER,
etc).

  Green Book format is aka Patent Full-Text/APS format.