SU54425A1
(en )
1938-11-30
The method of hardening rail against fracture
SU55395A1
(en )
1938-11-30
The method of obtaining likes
SU55576A1
(en )
1938-11-30
The method of artificial aging of wines
SU54618A1
(en )
1938-11-30
The method of repair of hollow cast metal blocks
SU54620A1
(en )
1938-11-30
The method of heat treatment of spiral springs
SU55611A1
(en )
1938-11-30
The method of obtaining aromatic oxaldehyde
SU55551A1
(en )
1939-08-31
The method of obtaining sulfur dyes
SU54398A1
(en )
1938-11-30
Method of tempering hardened steel
SU54814A1
(en )
1938-11-30
The method of obtaining food acetic acid
SU55610A1
(en )
1938-11-30
The method of obtaining artificial resin
SU54822A1
(en )
1938-11-30
The method of processing cedar plates for the manufacture of pencils
SU54797A1
(en )
1938-11-30
Sulfuric Acid Denitration Method
SU53785A1
(en )
1938-08-31
The method of obtaining neosalvarsana
SU54382A1
(en )
1938-11-30
The method of producing alkyl mercurphosphates
SU15393A1
(en )
1930-05-31
The method of manufacture of oxide cathodes
SU55278A1
(en )
1938-11-30
Method for making blueprint paper
SU54535A1
(en )
1938-11-30
The method of cleaning technical acetic acid
SU54825A1
(en )
1938-11-30
The method of processing cedar pencil tablets
SU55556A1
(en )
1939-09-30
Germanium production method
SU11133A1
(en )
1929-09-30
Method of cleaning technical terpinehydrate
ES144000A1
(en )
1938-02-16
Improvements in the manufacture of rail joints.
DK59251C
(en )
1941-12-01
Edge rail.
GR7803B
(en )
1938-11-28
BACTERIA MANUFACTURING METHOD.
CH266848A
(en )
1950-02-28
Rail sliding joint connection.
CH219601A
(en )
1942-02-28
Rail fastening.