Joel Solon Spira (March 1, 1927 – April 8, 2015) was an American inventor, entrepreneur, and business magnate. He invented a version of the light-dimmer switch for use in homes around the United States and led his Lutron Electronics Company into the production of lighting controllers.
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| - جويل سبيرا (ar)
- Joel Spira (empresario) (es)
- Joel Spira (businessman) (en)
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| - جويل سبيرا (بالإنجليزية: Joel Spira) هو مخترِع ورائد أعمال أمريكي، ولد في 1 مارس 1927، وتوفي في 8 أبريل 2015. (ar)
- Joel Solon Spira (March 1, 1927 – April 8, 2015) was an American inventor, entrepreneur, and business magnate. He invented a version of the light-dimmer switch for use in homes around the United States and led his Lutron Electronics Company into the production of lighting controllers. (en)
- Joel Solon Spira (Nueva York, 1 de marzo de 1927 - Springfield, 8 de abril de 2015) fue un inventor y empresario estadounidense, reconocido por haber creado y patentado el primer atenuador de estado sólido para uso en hogares y por haber fundado la compañía Lutron Electronics. (es)
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| - Springfield Township, Pennsylvania, U.S. (en)
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| - New York City, NY, U.S. (en)
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| - invention of the first solid state-electronic dimmer and founder of Lutron Electronics Company (en)
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| - inventor, entrepreneur, business magnate (en)
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| - جويل سبيرا (بالإنجليزية: Joel Spira) هو مخترِع ورائد أعمال أمريكي، ولد في 1 مارس 1927، وتوفي في 8 أبريل 2015. (ar)
- Joel Solon Spira (March 1, 1927 – April 8, 2015) was an American inventor, entrepreneur, and business magnate. He invented a version of the light-dimmer switch for use in homes around the United States and led his Lutron Electronics Company into the production of lighting controllers. (en)
- Joel Solon Spira (Nueva York, 1 de marzo de 1927 - Springfield, 8 de abril de 2015) fue un inventor y empresario estadounidense, reconocido por haber creado y patentado el primer atenuador de estado sólido para uso en hogares y por haber fundado la compañía Lutron Electronics. (es)
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