I'm looking for a source that lists patent attorneys in the US (name
of the firm, address, and possibly telephone number) that specialize
in clients from Germany.  I will pay $20.00.

Hi frank2!!
I found for you a complete database of Patent Attorneys and Agents
Registered  to Practice before the US Patent and Trademark Office
(USPTO).
Also I found attorneys registered to USPTO that work in Germany.

All the links are found in the "United States Patent and Trademark
Office Home Page"
http://www.uspto.gov/

To the list of the Germany attorneys visit:
http://www.uspto.gov/cgi-bin/attorney/atty.cgi?germany&max=1000

From that list I suggest to you the attorneys from "Dorries,
Frank-Molnia & Pohlman"
You can find info from them in their company Home Page:
"df-mp"
http://www.df-mp.com/com/fra_struct.htm

If you need a list of US attorneys you can visit:
"Patent Attorneys and Agents: Listings by Geographic Region"
http://www.uspto.gov/web/offices/dcom/olia/oed/roster/region/index.html

The companies that claim work with foreign patents in US are:
"Patent Law Offices" 
of 
Joseph R. Birkner, M.E. 
Registered Patent Agent 
4 Earley Road
Peabody, Massachusetts 01960-1218 
Phone: (978) 536-2864


"GREENBERG & LIEBERMAN"
Postal & Physical Address:
Greenberg & Lieberman
314 Philadelphia Ave.
Takoma Park
MD 20912
United States of America
Telephone: +1-888-275-2757 Or +1-301-588-8393
Fax No.: +1-301-588-3292
Send Email to: piper@aplegal.com 
Home Page: http://www.aplegal.com


"NEUSTEL LAW OFFICES - REGISTERED PATENT ATTORNEY"
Postal & Physical Address:
Neustel Law Offices - Registered Patent Attorney
Attn: Michael S. Neustel
2534 South University Drive, Suite No. 4
Fargo, ND 58103
United States of America
Telephone: +1-800-281-7009 Or +1-701-237-8822
Fax No.: +1-701-237-0544
Send Email to: neustel@patent-ideas.com 
Home Page: http://www.patent-ideas.com/ Or
http://www.patentoffices.com


You can also visit the "Patent Law Firms.Com Directory"
http://patentlawfirms.com/directory.html


For information related to "Independent Inventors Resources":
http://www.uspto.gov/web/offices/com/iip/data.htm#USPTOrole


Keyword:
patent attorneys

Search Engine used:
Google

Search results page:
://www.google.com/search?q=patent+attorneys&hl=en&lr=&ie=UTF-8&start=0&sa=N

I hope this helps, if you need a clarification please feel free to
request it.
Best Regards
livioflores-ga

Thank you, livioflores-ga - the directories & links that you provided
have been a great help.