FR845349A
(en )
1939-08-18
Method and apparatus for air filtration
FR647608A
(en )
1928-11-27
Method for adjusting the intensity of sound in the reproduction of phonograms
FR642373A
(en )
1928-08-28
Method and devices for making and reproducing sound films
FR842628A
(en )
1939-06-15
Method and device for adjusting sound intensity in the reproduction of sound recordings
FR556398A
(en )
1923-07-19
Method and apparatus for the artificial reconstitution of daylight
CH225596A
(en )
1943-02-15
Method and device for producing casting molds for the simultaneous casting of several crankshafts and casting mold produced according to this method.
FR873764A
(en )
1942-07-20
Method for increasing the range of intensities in sound recordings
FR583418A
(en )
1925-01-13
Mirror stand used for sound recording
FR717704A
(en )
1932-01-13
Method for the juxtaposition of magnetic recordings
FR586034A
(en )
1925-03-13
Bodywork setting process providing lightness and silence
FR607354A
(en )
1926-07-01
Process for the regeneration of adsorption agents
FR556892A
(en )
1923-07-28
Method and apparatus for the continuous manufacture of acetone
FR673115A
(en )
1930-01-10
Improvements to the process for reproducing irregular surfaces
FR600481A
(en )
1926-02-08
Process for the purification of oriental essence
FR841319A
(en )
1939-05-17
Method and devices for acting on the sound intensity value of sound recordings
FR606298A
(en )
1926-06-10
Apparatus for producing the stop in cinematographic reproducing apparatus
FR840962A
(en )
1939-05-08
Lubricant and process for obtaining it
FR692012A
(en )
1930-10-29
Process for the regeneration of celluloid waste
FR526812A
(en )
1921-10-14
Method and apparatus for the use of hydrothermal force
FR679870A
(en )
1930-04-18
Process Improvements for Reducing the Intensity of Undue Pulse Intensity in Amplifier and Loudspeaker Electrical Circuits
FR840530A
(en )
1939-04-27
Method for obtaining sound recordings
FR601973A
(en )
1926-03-10
Method and devices for time distribution
FR660561A
(en )
1929-07-12
Process for the reproduction of lines
FR746907A
(en )
1933-06-08
Needle for the production of sound recordings
FR509845A
(en )
1920-11-20
Method and apparatus for preventing the formation of scum in drainers