Master unit for an intercommunication system
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Description
FIG. 1 is a front and right side perspective view of a master unit for an intercommunication system showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a rear elevational view thereof; and
FIG. 7 is a bottom plan view thereof.
Referenced Cited
U.S. Patent Documents
Other references
D274518 | July 3, 1984 | Doodson |
D291888 | September 15, 1987 | Fong et al. |
D292401 | October 20, 1987 | Lee et al. |
D292706 | November 10, 1987 | Fischer |
D300631 | April 11, 1989 | Culbertson |
D301037 | May 9, 1989 | Matsuda |
- CQ The Radio Amateur's Journal; Nov. 1986; p. 33; Sony AIR-8.
Patent History
Patent number: D310219
Type: Grant
Filed: Nov 12, 1987
Date of Patent: Aug 28, 1990
Assignee: Tunstall Telecom Limited (Whitley Bridge)
Inventor: Martin F. Carlile (Doncaster)
Primary Examiner: Theodore M. Shooman
Law Firm: Darby & Darby
Application Number: 7/120,089
Type: Grant
Filed: Nov 12, 1987
Date of Patent: Aug 28, 1990
Assignee: Tunstall Telecom Limited (Whitley Bridge)
Inventor: Martin F. Carlile (Doncaster)
Primary Examiner: Theodore M. Shooman
Law Firm: Darby & Darby
Application Number: 7/120,089
Classifications