FR8782E -
Device and method for the continuous manufacture of filaments for lighting and heating by gas (or its equivalents) or by electricity in the open air
- Google Patents
Device and method for the continuous manufacture of filaments for lighting and heating by gas (or its equivalents) or by electricity in the open air
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H01K1/04—Incandescent bodies characterised by the material thereof
H01K1/12—Bodies which are non-conductive when cold, e.g. for Nernst lamp
FR8782D1907-06-101908-01-16
Device and method for the continuous manufacture of filaments for lighting and heating by gas (or its equivalents) or by electricity in the open air
ExpiredFR8782E
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