FR725959A
(en )
1932-05-20
Refrigeration improvements
FR717536A
(en )
1932-01-09
Improvements in the manufacture of artificial materials
BE378717A
(en )
1931-05-30
Improvements in the manufacture of strip matches
FR687620A
(en )
1930-08-11
Improvements in the manufacture of knives
FR706639A
(en )
1931-06-27
Improvements in the manufacture of espadrilles
FR702403A
(en )
1931-04-08
Improvement in the manufacture of sandals
FR712523A
(en )
1931-10-03
Improvements in the manufacture of cements
FR721608A
(en )
1932-03-05
Improvements in the production of polychlornaphthalenes
FR725150A
(en )
1932-05-09
Improvements in the manufacture of glycols
FR701461A
(en )
1931-03-17
Improvements in the manufacture of soles
FR694810A
(en )
1930-12-08
Footwear making improvements
FR717145A
(en )
1932-01-04
Improvements in the manufacture of amidines
FR719694A
(en )
1932-02-09
Improvements in the manufacture of fertilizers
FR715030A
(en )
1931-11-24
Improvements in the manufacture of hydroxy-aliphatic amines
FR711554A
(en )
1931-09-12
Hand compressor
FR715031A
(en )
1931-11-24
Improvements in the manufacture of aliphatic aldehydes
FR709551A
(en )
1931-08-10
Improvement in the manufacture of umbrellas
FR725962A
(en )
1932-05-20
Improvements in the manufacture of tracks
FR701367A
(en )
1931-03-16
Improvements in the manufacture of magnetic alloys
FR39060E
(en )
1931-08-26
Improvements in the production of phonograms
FR702332A
(en )
1931-04-04
Improvements in the manufacture of joined tubes
FR726658A
(en )
1932-06-01
Improvement in the manufacture of gourds
FR722886A
(en )
1932-03-29
Improvements in shoe manufacturing
FR715438A
(en )
1931-12-03
Improvements in the manufacture of horn combs
FR712987A
(en )
1931-10-16
Improvements in the manufacture of wallets