FR769879A
(en )
1934-09-03
Improvements in the manufacture of artificial materials
FR704320A
(en )
1931-05-18
Improvements in the manufacture of lightweight beams
FR698795A
(en )
1931-02-05
Improvements in the manufacture of artificial resins
FR676730A
(en )
1930-02-26
Improvements in the manufacture of nitro-cellulose
BE361495A
(en )
1929-07-31
Improvements in the manufacture of nitro-cellulose
FR657215A
(en )
1929-05-18
Improvements in the manufacture of toothbrushes
FR672626A
(en )
1930-01-04
Improvements in the manufacture of catalysts
FR33752E
(en )
1929-03-04
Improvements in the manufacture of the braid
FR684144A
(en )
1930-06-21
Improvements in the manufacture of artificial materials
FR690094A
(en )
1930-09-16
Improvements in the manufacture of mercaptobenzthiazol
FR664406A
(en )
1929-09-03
Improvements in the manufacture of cellulose
FR656630A
(en )
1929-05-10
Improvements in the manufacture of windshields
FR709551A
(en )
1931-08-10
Improvement in the manufacture of umbrellas
FR638957A
(en )
1928-06-08
Improvements in the manufacture of dextrose
FR685091A
(en )
1930-07-04
Improvements in the production of linoleum
FR36875E
(en )
1930-09-20
Improvements in the production of phonograms
FR654657A
(en )
1929-04-09
Improvements in the manufacture of wheels
FR667693A
(en )
1929-10-19
Improvements in the manufacture of suspenders
FR647713A
(en )
1928-11-30
Improvements in the manufacture of circular hacksaws
FR673389A
(en )
1930-01-14
Improvements in the manufacture of envelopes
FR655480A
(en )
1929-04-19
Improvements in the manufacture of nails
FR648311A
(en )
1928-12-07
Improvement in the manufacture of mannequins
FR706639A
(en )
1931-06-27
Improvements in the manufacture of espadrilles
FR677490A
(en )
1930-03-11
Improvements in the manufacture of seats
FR35869E
(en )
1930-03-29
Improvements in the manufacture of certain enamels