CH256801A
(en )
1948-09-15
Glass set for the production of optical glasses.
CH211857A
(en )
1940-10-15
Process for the production of stable copper phthalocyanine.
AT148678B
(en )
1937-02-25
Machine for the automatic production of support frames intended for electric tubular light bulbs.
CH204534A
(en )
1939-05-15
Process for the production of photographic layers.
CH208495A
(en )
1940-02-15
Process for the production of glass melts.
CH205677A
(en )
1939-06-30
Process for making porous supports.
CH187762A
(en )
1936-11-30
Machine for making tires.
FR807053A
(en )
1937-01-04
Machine for the automatic manufacture of supports for tubular incandescent electric lamps
AT134421B
(en )
1933-08-10
Process for making centreless electric incandescent lamps.
ES130668A1
(en )
1933-07-01
Filament manufacturing process for electric lamps.
CH175343A
(en )
1935-02-28
Process for the production of phenanthrene.
AT155596B
(en )
1939-02-25
Luminaries for electric light bulbs.
FR45744E
(en )
1935-11-18
Filament for electric lamps
ES126189A1
(en )
1932-05-01
Improvements in the manufacturing machines of electric lamps.
FR767120A
(en )
1934-07-10
Support for tubular electric lamp filaments
ES141296A1
(en )
1936-06-01
New manufacturing process for electric incandescent lamps.
ES136976A3
(en )
1935-06-16
Improvements in the manufacture of electric incandescent lamps.
ES132131A1
(en )
1934-02-01
New manufacturing process for electric lamps.
CH167129A
(en )
1934-02-15
Spinneret for the production of rayon.
ES3076Y
(en )
1935-06-01
New electric incandescent lamp.
ES136974A1
(en )
1935-05-16
Improvements in the manufacture of electric filament filament lamps.
AT152558B
(en )
1938-02-25
Process for the production of dyes.
CH207066A
(en )
1939-09-30
Process for the production of cord yarns.
ES136743A1
(en )
1935-05-01
Improvements in electric incandescent lamps.
ES140780A1
(en )
1936-03-16
Improvements in electric incandescent lamps.