In a message dated 4/21/06 18:44:07, [log in to unmask] writes: > 5,184,768 Feb. 1993 > http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u= > /netahtml/search-bool.html&r=1&f=G&l=50&co1=AND&d=ptxt&s1=5,184,768.WKU. > &OS=PN/5,184,768&RS=PN/5,184,768 > > Hi Bill, Thanks for the info--given this patent date (even assuming the disclosure date is some 5 years earlier), the work done by Bell Labs in 1981/82 and possibly others would render this patent invalid due to the prior art. Werner --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------