CH78751A
(en )
1918-09-02
Method and machine for making trenches
CH79041A
(en )
1918-10-01
Method and machine for producing roof shingles
CH69603A
(en )
1915-07-01
Machine for making tunnels
AT91799B
(en )
1923-03-26
Method and machine for making precise screws.
CH79922A
(en )
1919-06-02
Machine for the production of briquettes
CH80714A
(en )
1919-04-01
Machine for the production of bevel gears
AT91033B
(en )
1923-01-25
Process and machine for the production of reinforced concrete pipes and beams.
AT94939B
(en )
1923-11-26
Method and machine for manufacturing hinges.
CH81935A
(en )
1919-08-16
Machine for making hairpins
CH77891A
(en )
1918-10-16
Machine for the production of hollow stones
CH75490A
(en )
1917-08-01
Machine for the production of briquettes
CH82936A
(en )
1919-11-01
Key and method of making the same
AT90830B
(en )
1923-01-10
Machine for tillage and for making trenches.
CH79146A
(en )
1918-10-01
Method of making briquettes
CH77377A
(en )
1918-09-02
Machine for making sand soap
AT100191B
(en )
1925-06-10
Process for preparing gels.
CH58405A
(en )
1913-03-17
Method and machine for making cigarettes
AT82952B
(en )
1921-02-25
Process for creating chains.
CH79807A
(en )
1919-05-16
Process for making shaving soap
CH57549A
(en )
1913-01-16
Firelighter and method and machine for making the same
CH81559A
(en )
1919-11-17
Process for the preparation of 4-6-dichloroisatin
CH81551A
(en )
1919-11-01
Process for the preparation of 4-chloro-7-methylisatin
CH80637A
(en )
1919-08-16
Process for the preparation of 4-7-dimethylisatin
CH80633A
(en )
1919-08-01
Process for the preparation of 7-chloroisatin
CH80641A
(en )
1919-08-16
Process for the preparation of 7-methylisatin