CH201086A
(en )
1938-11-15
Commutator for electrical machines and process for their manufacture.
CH73144A
(en )
1916-08-16
Electric incandescent lamp and method and apparatus for making same
CH77704A
(en )
1918-05-16
Platinum-free fuse wire for incandescent lamps and apparatus with an oxygen-free glass envelope and the process for producing this wire
CH65625A
(en )
1914-07-01
Method and device for manufacturing electric incandescent lamps
CH73508A
(en )
1916-10-16
Method and device for venting electric incandescent lamps and other glass vessels
CH68740A
(en )
1915-04-16
Electric gas lamp and process for its manufacture
CH71951A
(en )
1916-03-16
Method and apparatus for making multiple flanges on tubes
CH70111A
(en )
1915-09-16
Method and machine for the production of hollow, thin-walled glass objects, e.g. B. Bulbs for electric lighting
CH68893A
(en )
1915-05-01
Electric gas lamp and method of making the same
CH54036A
(en )
1912-04-16
Tungsten wire for electric light bulbs and process for its manufacture
CH80466A
(en )
1919-03-01
Process for the manufacture of tungsten incandescent lamps
CH46765A
(en )
1910-04-16
Metal filament brackets for electric light bulbs and method of making the same
CH76772A
(en )
1918-06-17
Electric radiator, and method and device for producing the same
CH82923A
(en )
1919-11-01
Procedure for venting electric light bulbs and other glass vessels
CH77492A
(en )
1918-04-16
Resistance compound for electrical heating elements with soapstone bodies and method for producing the same
CH73965A
(en )
1916-12-16
Incandescent bodies for electric light bulbs
CH74730A
(en )
1917-04-02
Device for making ropes
AT155585B
(en )
1939-02-25
Method and device for the production of coiled filaments for electric light bulbs
CH59749A
(en )
1913-06-02
Process for manufacturing incandescent mantles
CH78641A
(en )
1918-12-16
Process for making electric ovens
CH50419A
(en )
1911-06-01
Flat electrical cable and method and apparatus for making the same
CH70212A
(en )
1915-09-01
Method of replacing the filaments of electric light bulbs
CH75776A
(en )
1917-09-17
Process for the production of electrical insulating fittings
CH75351A
(en )
1917-07-16
Method and device for the production of interchangeable photographs
CA171670A
(en )
1916-08-29
Method and apparatus for signalling