U.S. patent number D319,031 [Application Number 07/245,536] was granted by the patent office on 1991-08-13 for tactile annunciator for alerting persons with or without hearing impairments. This patent grant is currently assigned to Behavioral Dynamics, Inc.. Invention is credited to Steven Levinson.
United States Patent | D319,031 |
Levinson | August 13, 1991 |
Inventors: | Levinson; Steven (Newfolden, MN) |
---|---|
Assignee: | Behavioral Dynamics, Inc.
(Newfolden, MN) |
Appl. No.: | 07/245,536 |
Filed: | September 19, 1988 |
Current U.S. Class: | D10/106.1; D24/187; D10/49 |
Field of Search: | ;D24/17,8,21 ;340/407,573,689 ;131/270 ;368/230 ;128/802,739,741,787,794,389,385 ;D10/49-52 |
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