Constant distortion volume control unit
Description
FIG. 1 is a front perspective view of a constant distortion volume control unit, showing my new design;
FIG. 2 is a front elevation of the unit;
FIG. 3 is a left side elevation of the unit as seen from the left of FIG. 2;
FIG. 4 is a rear elevation of the unit;
FIG. 5 is a top plan view of the unit; and
FIG. 6 is a bottom plan view of the unit.
Referenced Cited
U.S. Patent Documents
Other references
D159458 | July 1950 | Zapolski |
D168614 | January 1953 | Floria |
D199677 | December 1964 | Mattingly |
D211092 | May 1968 | Kahn |
D228922 | October 1973 | Pruyne |
D244214 | May 3, 1977 | Ross |
D244215 | May 3, 1977 | Ross |
- Allied Electronics for Everyone, 1968, P. 185, Talk-A-Phone, item No. #12B8054-X.
Patent History
Patent number: D256798
Type: Grant
Filed: Mar 3, 1978
Date of Patent: Sep 9, 1980
Inventor: Donald T. Scholz (Wayland, MA)
Primary Examiner: Bernard Ansher
Attorney: Arthur Z. Bookstein
Application Number: 5/883,350
Type: Grant
Filed: Mar 3, 1978
Date of Patent: Sep 9, 1980
Inventor: Donald T. Scholz (Wayland, MA)
Primary Examiner: Bernard Ansher
Attorney: Arthur Z. Bookstein
Application Number: 5/883,350
Classifications
Current U.S. Class:
D14/96;
D14/92
International Classification: D1499;
International Classification: D1499;