GB487708A
(en )
1938-06-24
Improvements in or relating to aerial and feeder systems
GB464443A
(en )
1937-04-19
Improvements in or relating to aerial systems
US2187014A
(en )
1940-01-16
Antenna transformer
GB528179A
(en )
1940-10-24
Improvements in or relating to thermionic valve amplifiers
GB436012A
(en )
1935-10-03
Improvements in or relating to high frequency transmission systems
GB519110A
(en )
1940-03-18
Improvements in or relating to ultra short wave circuits
US1895071A
(en )
1933-01-24
Dynamic loud speaker unit
US2199820A
(en )
1940-05-07
Coupling circuits
GB581972A
(en )
1946-10-31
Improvements in or relating to concentric line impedance transformers
GB462911A
(en )
1937-03-17
Improvements in and relating to feeders and the like for electric currents of high frequency
US2226688A
(en )
1940-12-31
Wave transmission system
US3437947A
(en )
1969-04-08
Signal amplifier having grounded-base stage for a cable terminating impedance
US3458846A
(en )
1969-07-29
Reactance-free reversely folded resistive shunt in coaxial line
US1639727A
(en )
1927-08-23
Aerial
SU76555A3
(ru )
1948-11-30
Устройство дл соединени концентрического фидера с двум возбуждаемыми в противоположных фазах симметричными концентрическими лини ми
GB262968A
(en )
1926-12-23
Improvements in and relating to electric wire attachments
USD59840S
(en )
1921-11-29
Design for an attachment-plug or connector
BE449657A
(enExample )
1943-04-30
CH99628A
(fr )
1923-06-16
Installation téléphonique comprenant un dispositif amplificateur des courants devant être transmis sur une ligne interurbaine.
GB274576A
(en )
1927-07-25
Improvements in and relating to sound amplifying devices for use with telephone receivers
US274352A
(en )
1883-03-20
Receiving-telephone
GB653876A
(en )
1951-05-30
Improvements in and relating to short-wave aerials
US1977125A
(en )
1934-10-16
Transmission of electrical impulses by radio
USD66120S
(en )
1924-12-02
Design for a traffic signal
GB235942A
(en )
1925-06-24
Improvements in or relating to link-chains, bracelets and the like