GB512042A
(en )
1939-08-28
Improvements in or relating to thermionic valve circuits
GB512173A
(en )
1939-08-30
Improvements in thermionic valve circuits
US2264488A
(en )
1941-12-02
Electron device
CA368518A
(en )
1937-09-07
Thermionic valve circuit
CA366779A
(en )
1937-06-15
Thermionic valve circuit arrangement
CA366804A
(en )
1937-06-15
Thermionic valve circuit arrangement
AU109566B2
(en )
1940-01-25
Improvements in thermionic valve circuits
GB508058A
(en )
1939-06-26
Improvements in or relating to thermionic valve circuits
GB508038A
(en )
1939-06-26
Improvements in or relating to thermionic valve circuits
GB511850A
(en )
1939-08-25
Improvements in or relating to thermionic valve circuit arrangements
GB509494A
(en )
1939-07-17
An improved radio valve
IE15436L
(en )
1939-05-11
Thermionic valve circuits.
AU108992B2
(en )
1939-11-16
Improvements in circuit arrangements for thermionic valves
GB510703A
(en )
1939-08-04
Improvements in thermionic valves
CA376945A
(en )
1938-10-11
Thermionic valve circuit
CA370955A
(en )
1938-01-04
Thermionic valve circuit
AU103862B2
(en )
1938-05-12
Improvements in or relating to circuits for thermionic valves
CA357286A
(en )
1936-04-21
Thermionic valve circuit
AU208739A
(en )
1940-01-25
Improvements in thermionic valve circuits
CA380654A
(en )
1939-04-11
Thermionic valve circuit
CA368620A
(en )
1937-09-14
Valve excitation circuit
AU478338A
(en )
1939-11-16
Improvements in circuit arrangements for thermionic valves
AU125537A
(en )
1938-05-12
Improvements in or relating to circuits for thermionic valves
GB512327A
(en )
1939-09-01
Improvements in or relating to thermionic valve circuits
CA370337A
(en )
1937-12-07
Valve