OTL Asylum

RE: I know, I know

69.108.69.187

In Reply to: RE: I know, I know posted by Ralph on November 05, 2009 at 13:55:33

U.S. Patent 2,705,265, C. T. Hall, "Parallel Opposed Power Amplifiers" was filed on June 7, 1951 and granted on March 29, 1955.

Finnish Patent 27332, Tapio Köykkä, (original amplifier) was filed on September 2, 1952 and granted on November 10, 1954.

U.S. Patent 2,828,369, A. M. Wiggins, "High Fidelity Audio Amplifier" was filed on March 1, 1954 and granted on March 25, 1958.

Finnish Patent 29642, Tapio Köykkä, (improvements to the amplifier) was filed on September 30, 1955 and granted on April 10, 1958.

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Have Fun and Enjoy the Music
"Still Working the Problem"

Wiggins Patent (Open in New Window)

Follow Ups:

RE: I know, I know - Ralph 09:06:00 11/09/09 (1)
- You're welcome (nt) - Tre' 12:06:55 11/09/09 (0)

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