W.A. Anderson

Low Frequency Amplifier

1946

M. Artzt

Balanced Direct and Alternating Current Amplifiers

1940

 

A.B. Bereskin

Audio Transformer

1954

J.R. Bowman

Amplifier

1940

R.P. Clements

Direct Coupled FeedBack Amplifier

1954

W.H. Coulter

Amplifier having series connected output tubes

1952

L. de Forest

Device for amplifying feeble electrical currents

1907

F.H. Drake

Electrical circuit and transformer therefor

1928

M. Farber

Single Tube Amplifier with transformer output

1954

J.A. Fleming

Instrument for converting alternating electric currents into continous current

1905

J. Futternam

Amplifier

1953

 

D. Hafler

Transformers

1955

C.T. Hall

Direct Coupled power amplifiers

1950

Haber

Wideband audio transformer

1999

W.H.T. Holden

Amplifying system

1931

R.W. Ketchledge

Distortionless feedback amplifier

1952

W.R. Koch

Power Output Amplifier Circuit

1943

E.H. Krohn

Power Amplifier

1958

Larsen

Single Ended Transformer Coupled Audio Amplifier

1995

H.L. Mansford

Amplifier Circuits

1947

W.W. Macalpine

Distortionless Transmission System

1932

 

B. McMillan

Multiple-FeedBack Systems

1951

 

F.H. McIntosh

WideBand Amplifier

1949

J. Merhaut

Parallel assembly of amplifiers

1951

O.V. Mitchell

Thermionic Tube Circuit

1943

R.C. Moore

Vacuum Tube Amplifier

1949

A.R. Pearlmann

Balanced Amplifier

1955

A.P.G. Peterson

Distortionless audio amplifier

1951

T.A. Rich

Feed-Back Circuit

1951

Rozenblit

Transformerless output vacuum tube audio amplifier

1997

N.B. Saunders

Signal transducer with distortion compensation amplifier

1946

G.S.P. Scantlebury

Thermionic Valve Amplifier circuit arrangement

1944

H. Seidel

Feed Forward Amplifier

1967

Sohn

Low frequency transformer

1984

W. Soller

Electron tube amplification system

1934

E.K. Stodola

Electron tube power output circuit

1945

B.S. Vilkomerson

Multiple load amplification syatem

1949

E.L.C. White

Thermionic valve amplifier circuit arrangement 

1943

Yamada

Vacuum tube audio amplifying circuit

1999

Yamasita

Tube amplifier having special configuration with two or more tubes 

1999