GB247619A
(enExample )
1900-01-01
US1432553A
(en )
1922-10-17
Production of color music and other luminous effects and apparatus therefor
US1434727A
(en )
1922-11-07
System of electric lighting
US1401608A
(en )
1921-12-27
Illum nating attachment for keyboard musical instruments
US1221590A
(en )
1917-04-03
Indicating electric switch.
US2019075A
(en )
1935-10-29
Bell ringing circuit and switch therefor
US1728860A
(en )
1929-09-17
Producing color music and other spectacular luminous effects
GB288090A
(en )
1928-04-05
Improvements in electric imitation coal fires
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
GB190006826A
(en )
1901-02-16
Improvements in Switches for Electric Currents.
US521924A
(en )
1894-06-26
wright
ES8104884A1
(es )
1981-04-16
Cuadro de mando para una instalacion de alumbrado electrico
US514480A
(en )
1894-02-13
Cut-out
US689711A
(en )
1901-12-24
Electric visual-signal apparatus.
PL35076B1
(enExample )
1952-04-30
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
GB713452A
(en )
1954-08-11
Improvements in or relating to electrical control apparatus
Harting
1879
THE FERAE NATURAE OF THE LONDON PARKS.