Electronic intercommunication unit
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FIG. 1 is a front elevational view of an electronic intercommunication unit showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and
FIG. 7 is a front, top and side perspective view thereof.
The door-phone box of the present design may be used as installed, for example, on a wall at a building entrance or the like in combination with a multifunctional telephone set, so that a manual pressing of the operating button will produce at the telephone set a chime sound of a visitor's calling and a conversation may be made between the door-phone box in the exterior and the telephone set in the interior of a building.
D174406 | April 1955 | Adler |
D199677 | December 1964 | Mattingly |
D210026 | January 1968 | Kahn |
D211092 | May 1968 | Kahn |
D255444 | June 17, 1980 | Houlihan |
D255901 | July 15, 1980 | Tokiyama |
D259422 | June 2, 1981 | Taylor |
D264716 | June 1, 1982 | Nakajima |
D274518 | July 3, 1984 | Doodson |
D275101 | August 14, 1984 | Read |
- Talk-O-Products Brochure "Intercommunication Systems": pp. 3-5.
Type: Grant
Filed: Apr 29, 1983
Date of Patent: Jul 2, 1985
Assignee: Nippon Tsushin Kogyo Kabushiki Kaisha (Kanagawa)
Inventor: Suemitsu Nakashima (Kawasaki)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Horace B. Fay
Law Firm: Burns, Doane, Swecker & Mathis
Application Number: 6/490,134