CH75570A
(en )
1917-09-01
Manufacturing process of an improved product for the cementation of iron and steel objects
FR481705A
(en )
1917-01-09
Electrolytic process for removing oxide or rust from the surface of iron or steel objects
CH58727A
(en )
1913-04-01
New process for the case-hardening of objects made of iron or steel or formed from steel alloys
FR434443A
(en )
1912-02-02
New process for the case-hardening of objects made of iron or steel or formed from steel alloys
FR532610A
(en )
1922-02-08
Process for the manufacture of heavy metal azides suitable for being charged, and products resulting from this process
FR415985A
(en )
1910-10-08
Process for carburizing articles of iron and steel, or steel alloys
FR479370A
(en )
1916-03-17
Process for the surface oxidation of articles of iron, steel and the like
FR498221A
(en )
1920-01-06
Process for the production of steel
FR498222A
(en )
1920-01-06
Process for the production of metal alloys
FR425257A
(en )
1911-06-07
Method of decorating enamelled metal articles
CH77956A
(en )
1918-06-17
Process for the manufacture of steel wool and product obtained by the application of this process
FR487790A
(en )
1918-07-24
Process for the manufacture of protected metal parts, and resulting products
FR495955A
(en )
1919-10-23
Process for the production of advanced metal alloys
FR529753A
(en )
1921-12-06
Process for the manufacture of core parts for iron and metal foundry
FR512545A
(en )
1921-01-25
Process for the production of refractory objects
FR429518A
(en )
1911-09-25
Process for hardening iron and steel objects
FR436145A
(en )
1912-03-19
Process for preparing waste wood of all kinds for the cementation of iron and steel
FR404911A
(en )
1909-12-15
Process for the production of cast hollow metal objects
FR471170A
(en )
1914-10-17
Process for the production of decorative objects
FR518096A
(en )
1921-05-19
Process for the manufacture of asbestos plates and similar products
CH74342A
(en )
1917-02-16
Process for the production of artifacts
FR494246A
(en )
1919-09-03
Process for the manufacture of a ketone product
FR518989A
(en )
1921-06-02
Iron and steel manufacturing process
FR518615A
(en )
1921-05-28
Process for the cementation of iron and steel
FR473435A
(en )
1915-01-12
Process for the manufacture of metal objects formed from layers of different natures