U.S. patent number D304,726 [Application Number 07/249,461] was granted by the patent office on 1989-11-21 for telephone dialing apparatus. This patent grant is currently assigned to American Telephone and Telegraph Company, AT&T Bell Laboratories. Invention is credited to Richard R. Brooks, John H. Schaffeld.
United States Patent | D304,726 |
Brooks , et al. | November 21, 1989 |
Inventors: | Brooks; Richard R. (Greenwood, IN), Schaffeld; John H. (Morristown, NJ) |
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Assignee: | American Telephone and Telegraph
Company (New York, NY) AT&T Bell Laboratories (Murray Hill, NJ) |
Appl. No.: | 07/249,461 |
Filed: | September 26, 1988 |
Current U.S. Class: | D14/149; 379/434; D14/142; D14/245; D14/252 |
Field of Search: | ;D14/140,142,144,149,150,251,244,245,243,239 ;379/440,419,420,428,434,436,454 ;D6/310,300,311 |
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