How can I get a copy of US patent #5, 159,703?  It is a subliminal
technology recently declassified. I would like to be able to contact
the patent holder so I can create my own personal growth cds to sell.
Ideally I'd also be able to show a sound engineer the specs and have
them develop a cheaper alternative method of generating silent
subliminal messages. Incidently- I've heard shopping centres (and the
US military) often use this technolog now who makes the silent
broadcasts they hide in their music/ radio transmissions/ even piping
it in hidden with the aircon souns in malls etc?

Hello.

You can view a copy of US patent # 5,159,703 on the web site of the
U.S. Patent & Trademark Office:

Silent subliminal presentation system 
Inventors: Lowery; Oliver M.
Appl. No.: 458339
Filed: 	December 28, 1989
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1=5,159,703.WKU.&OS=PN/5,159,703&RS=PN/5,159,703

Click on "Images" on the top of that web page, or use this link to
view the 7 pages drawings, specifications, etc.
http://patimg1.uspto.gov/.piw?Docid=05159703&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DPALL%2526p%3D1%2526u%3D%2Fnetahtml%2Fsrchnum.htm%2526r%3D1%2526f%3DG%2526l%3D50%2526s1%3D5,159,703.WKU.%2526OS%3DPN%2F5,159,703%2526RS%3DPN%2F5,159,703&PageNum=&Rtype=&SectionNum=&idkey=9BAF295BA4AD

Note that to view the images, your web browser must be able to view
TIFF file
http://www.uspto.gov/patft/help/images.htm

If you're using a Macintosh, the QuickTime plug-in reads TIFF files.
If you're using a Windows machine, the Patent & Trademark Office
mentions two free TIFF plug-ins:
Alternatiff
http://www.alternatiff.com/
Internetiff
http://www.internetiff.com/

search strategy: 
uspto.gov, searched for patent 5,159,703

I hope this helps.

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Clarification of Answer by juggler-ga on 11 Apr 2003 23:40 PDT

With regards to your "incidental question," here's a seller of
subliminal music that claim that its products are used in shopping
malls:

"Our subliminal music is currently being successfully used by over
forty(40) top corporations internationally."
windmillsofyourmind.com
http://www.windmillsofyourmind.com/

Very quick and good... thanks!