CH81398A
(en )
1919-11-17
Process for the extraction of minerals
CH78964A
(en )
1918-09-16
Process for smelting smelting materials
CH80578A
(en )
1919-08-01
Process for the operation of gear drives
CH82032A
(en )
1919-08-16
Process for roasting fibrous materials
CH79066A
(en )
1918-10-01
Process for the extraction of oil
CH79648A
(en )
1918-12-16
Process for evaporation of liquids
CH80401A
(en )
1919-07-16
Process for drying potatoes
CH80919A
(en )
1919-04-16
Device for holding sheaves
CH81994A
(en )
1919-08-16
Process for treating mill products
CH81096A
(en )
1919-10-01
Process for briquetting fuels
AT88456B
(en )
1922-05-10
Process for the production of perylene.
CH82981A
(en )
1919-11-01
Process for the production of pulp
CH79475A
(en )
1918-11-16
Holder for hanging up patterns
FR520529A
(en )
1921-06-27
Ore concentration process
CH82595A
(en )
1919-10-01
Process for leaching substances
FR492648A
(en )
1919-07-12
Advanced process for the concentration of minerals
CH82924A
(en )
1919-11-01
Process for binding all kinds of bundles
CH78284A
(en )
1918-07-01
Process for compacting wood
CH81780A
(en )
1919-07-16
Process for cleaning machine oils
CH79599A
(en )
1918-12-02
Facility for cleaning cattle
CH81554A
(en )
1919-11-17
Process for the preparation of 5-methyl-7-chloroisatin
CH81558A
(en )
1919-12-01
Process for the preparation of 4-7-dichloroisatin
CH81551A
(en )
1919-11-01
Process for the preparation of 4-chloro-7-methylisatin
CH81552A
(en )
1919-11-01
Process for the preparation of 4-methyl-7-chloroisatin
CH80637A
(en )
1919-08-16
Process for the preparation of 4-7-dimethylisatin