GB247619A
(https= )
1900-01-01
DE69216195D1
(de )
1997-02-06
Ultra-Hochspannungsschalter
US1432553A
(en )
1922-10-17
Production of color music and other luminous effects and apparatus therefor
US769203A
(en )
1904-09-06
Electric signal.
US1434727A
(en )
1922-11-07
System of electric lighting
US1401608A
(en )
1921-12-27
Illum nating attachment for keyboard musical instruments
US1961748A
(en )
1934-06-05
Electric cathode glow lamp
US2019075A
(en )
1935-10-29
Bell ringing circuit and switch therefor
GB191505768A
(en )
1916-02-03
Improvements in Electric Lighting.
US1728860A
(en )
1929-09-17
Producing color music and other spectacular luminous effects
GB191120794A
(en )
1912-09-05
Improvements connected with Series Electrical Lighting.
SU126737A1
(ru )
1959-11-30
Электромузыкальный инструмент
ES208469A1
(es )
1953-06-01
Mejoras introducidas en los interruptores de efluvios para el encebado de lamparas fluorescentes
GB360595A
(en )
1931-11-12
Improvements in or relating to electric signalling systems
ES2071557B1
(es )
1997-12-01
Un sistema para la reduccion de consumo de energia electrica en redes de alumbrado, publico y privado.
GB190804066A
(en )
1909-01-07
Improvements in connection with Series-parallel Electric-lighting Circuits.
US2761980A
(en )
1956-09-04
Impedance apparatus for producing rapid irregular changes in current flow
US521924A
(en )
1894-06-26
wright
ES8104884A1
(es )
1981-04-16
Cuadro de mando para una instalacion de alumbrado electrico
SU145123A1
(ru )
1961-11-30
Устройство дл октавного удвоени мелодии
US514480A
(en )
1894-02-13
Cut-out
PL35076B1
(https= )
1952-04-30
Stearn et al.
1898
Continuation of discussion on “On the manufacture of lamps and other apparatus for 200-volt circuits”
GB428399A
(en )
1935-05-13
Improvements in or relating to electrical control systems for illumination apparatusassociated with musical instruments and producing spectacular effects
GB346460A
(en )
1931-04-16
Improvements in the electric illumination of pianos