GB247619A
(enrdf_load_stackoverflow )
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
US2019075A
(en )
1935-10-29
Bell ringing circuit and switch therefor
GB191505768A
(en )
1916-02-03
Improvements in Electric Lighting.
GB252229A
(en )
1926-05-12
Improvements in or relating to electric alarm systems
GB191120794A
(en )
1912-09-05
Improvements connected with Series Electrical Lighting.
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.
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.
GB190117363A
(en )
1902-08-28
A Luminous Press-button for Electric Bells for Indicating When the Attendant is Coming.
GB198384A
(en )
1923-06-07
System of coloured electric lighting working in combination with piano or organ
GB190925288A
(en )
1910-09-01
Improvements in connection with Installations of Electric Incandescent Lamps Connected in Series.
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
GB855937A
(en )
1960-12-14
Improvements in or relating to circuit arrangements for operating electric lamps
GB713452A
(en )
1954-08-11
Improvements in or relating to electrical control apparatus
GB107767A
(en )
1918-06-27
Improvements in the Production of Colour Music and Apparatus therefor.