SU10433A1
(en )
1929-07-31
Method of making electric incandescent lamps
SU10419A1
(en )
1929-07-31
Disinsection method
SU8878A1
(en )
1929-04-30
The method of processing shellac
SU17542A1
(en )
1930-09-30
The method of preparation of lubricating briquettes
SU16781A1
(en )
1930-09-30
Bulb for electric lamps with gas or steam
SU2085A1
(en )
1926-12-31
The method of changing the technical properties of gypsum
SU8656A1
(en )
1929-03-30
Shaped brick
SU18847A1
(en )
1931-01-31
Lacquer preparation method for electrical insulation materials
SU22786A1
(en )
1931-09-30
Method of making electrical wire resistances
SU10440A1
(en )
1929-07-31
Method for producing benzaldehyde
SU20166A1
(en )
1931-04-30
Method of making electrical resistances
SU1870A1
(en )
1924-09-15
Method of preparing mercury ointment
SU4713A1
(en )
1928-02-29
The method of connecting tubular electrical conductors of different diameters
SU23062A1
(en )
1931-09-30
Method of making stamps
SU8622A1
(en )
1929-03-30
Microphone
DK36384C
(en )
1926-08-16
Incandescent wire for electric Lamps, Termion tubes and the like.
GR1253B
(en )
1926-08-03
METHOD OF MANUFACTURING ELECTRIC LAMPS.
DK39193C
(en )
1928-09-03
Acid-resistant Incandescent base.
FR643378A
(en )
1928-09-15
Incandescent cathode
DK41951C
(en )
1930-03-31
Incandescent lamp.
DK43035C
(en )
1930-09-22
Electric incandescent lamp with several incandescent wires.
DK36363C
(en )
1926-08-16
Electric Bulb.
CA266512A
(en )
1926-12-07
Electrical lamp
CA261395A
(en )
1926-06-01
Electrical lamp
ES107166A1
(en )
1928-06-16
Incandescent electric lamp.