NL36703C
(en )
1935-10-03
Method and apparatus for the manufacture of wires, strings and the like, e.g. surgical sewing equipment, violin strings, racket coverings, etc.
SU34292A1
(en )
1934-01-31
A device for uniformly pulling films with sound recording
CH160978A
(en )
1933-04-15
Device for making plant holes.
FR754624A
(en )
1933-11-10
Photographic sound recording
SU39740A1
(en )
1934-11-30
The method of obtaining low-sulfur coke
FR768949A
(en )
1934-08-16
Method and apparatus for recording sound
SU31079A1
(en )
1933-07-31
The method of obtaining resin
SU31541A1
(en )
1933-08-31
Nozzle with turntable
SU40352A1
(en )
1934-12-31
The method of producing acetylene
SU30903A1
(en )
1933-06-30
Device for choosing nets
SU37809A1
(en )
1934-07-31
The method of obtaining viscose linen
SU31652A1
(en )
1933-08-31
Device for reducing noise (background) when playing back soundtracks recorded on film
CH174108A
(en )
1934-12-31
Method and device for producing perspective drawings.
FR787440A
(en )
1935-09-23
Device for electro-magnetic sound recording using the poulsen process
ES126802A1
(en )
1932-07-01
Procedure of recording and reproduction of sounds.
FR728644A
(en )
1932-07-08
Device allowing the transformation of recordings of sound vibrations into electrical vibrations and vice versa
FR751470A
(en )
1933-09-04
Sound recording process
FR755962A
(en )
1933-12-02
Recording method for sound films with version in several languages
CH175397A
(en )
1935-02-28
Sound pickup device.
AT134391B
(en )
1933-07-25
Sound recorder and player.
FR746510A
(en )
1933-05-30
Sound photographic recording process
FR733822A
(en )
1932-10-12
Improvements in photographic sound recording processes
FR734376A
(en )
1932-10-21
Phonographic recording process
FR750994A
(en )
1933-08-24
Recording and playing back sounds
AT134399B
(en )
1933-07-25
Device for the photographic recording of vibrations.