Channel expander
Description
FIG. 1 is a front plan view of a channel expander showing our new design.
FIG. 2 is a left side plan view thereof.
FIG. 3 is a top plan view thereof.
Referenced Cited
U.S. Patent Documents
Other references
| D95426 | April 1935 | Herrick |
| D105513 | August 1937 | Cardoza |
| D237281 | October 1975 | Spranger et al. |
- Control Corp., Communications and Control Brochure, 500 Pa. Ave., Irwin, Pa. 15642, Channel Expanders, Eight Line Cu1518, Twelve Line Cu1529, Loud Mouth.
Patent History
Patent number: D262288
Type: Grant
Filed: Jul 18, 1979
Date of Patent: Dec 15, 1981
Inventors: Robert C. Sistek (Huntingdon, PA), Richard J. Kuhn (Huntingdon, PA), Thomas I. Agnew (Irwin, PA)
Primary Examiner: Veronica O'Keefe
Attorney: Jon M. Lewis
Application Number: 6/58,570
Type: Grant
Filed: Jul 18, 1979
Date of Patent: Dec 15, 1981
Inventors: Robert C. Sistek (Huntingdon, PA), Richard J. Kuhn (Huntingdon, PA), Thomas I. Agnew (Irwin, PA)
Primary Examiner: Veronica O'Keefe
Attorney: Jon M. Lewis
Application Number: 6/58,570
Classifications
Current U.S. Class:
D14/58;
D14/52;
D14/53;
D14/92;
Plural Receivers (455/132)
International Classification: D1402;
International Classification: D1402;
