Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUST880003 I4
Publication typeGrant
Publication dateNov 24, 1970
Filing dateMay 5, 1969
Priority dateMay 5, 1969
Publication numberUS T880003 I4, US T880003I4, US-I4-T880003, UST880003 I4, UST880003I4
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adapter for telephone receivers having a small stray magnetic field
US T880003 I4
Abstract  available in
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16. 1969. 869 0.6. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading or each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oilice makes no assertion as to the novelty ot the disclosed subject matter.

PUBLISHED NOVEMBER 24, 1970 T880,003 ADAPTER FOR TELEPHONE RECEIVERS HAVING A SMALL STRAY MAGNETIC FIELD Gary L. Spahn, Indianapolis, Ind., assignor to Bell Telephone Laboratories, Incorporated, Murray Hill and Berkeley Heights, N.J., a corporation of New York Filed May 5, 1969, Ser. No. 821,692 Int. Cl. H04r 25/20 US. Cl. 179--1 2 Sheets Drawing. 7 Pages Specification llllllllllllllllllt-(Z 1 65 Filed May 5, 1969 PAHN T80003 2 Sheets-Sheet 1 F/GJ W 5O 5i u 22 65 -'I :if [I if FF/G. 2A

l/VVENTOR G. L SPAH/V ATTORNEY ADAPTER FOR TELEPHONE RECEIVERS HAVING A SMALL STRAY MAGNETIC FIELD Filed May 5. 1969 2 Sheets-Sheet 2

Classifications
U.S. Classification379/443, 381/180
International ClassificationH04M1/215, H04M1/21
Cooperative ClassificationH04M1/215
European ClassificationH04M1/215