DK43847C
(en )
1931-03-16
Procedure for roasting sulfur ores or sulfur-containing materials.
DK48964C
(en )
1934-07-09
Procedure for chlorination of sulphide ores.
DK47916C
(en )
1933-10-23
Procedure for Making Resitols.
DK48350C
(en )
1934-02-05
Procedure for the Extraction of Sulfur.
DK47386C
(en )
1933-05-29
Centrifuge.
DK47286C
(en )
1933-05-01
Procedure for Purifying Chemically Extracted Sulfur.
GR2840B
(en )
1930-07-31
IMPROVEMENTS IN SULFUR ROCK MELTING OVENS.
ES119915A1
(en )
1930-11-01
Improvements in the recovery of sulfur.
DK46548C
(en )
1932-11-28
Brake Cross Shaft and Procedure for Forming It.
ES121818A1
(en )
1931-03-16
Improvements in the recovery of sulfur.
ES121813A1
(en )
1931-03-16
Improvements in the recovery of sulfur.
ES121817A1
(en )
1931-03-16
Improvements in the recovery of sulfur.
ES121814A1
(en )
1931-03-16
Improvements in the recovery of sulfur.
ES121819A1
(en )
1931-03-16
Improvements in the recovery of sulfur.
ES121820A1
(en )
1931-03-16
Improvements in the recovery of sulfur.
ES121816A1
(en )
1931-03-16
Improvements in the recovery of sulfur.
ES121815A1
(en )
1931-03-16
Improvements in the recovery of sulfur.
DK39768C
(en )
1929-02-04
Procedure for the Treatment of Sulfur Pyrite.
DK47885C
(en )
1933-10-16
Procedure for the manufacture of peat or peat products.
DK46364C
(en )
1932-10-24
Baking form for making tartlets and the like.
ES117413A1
(en )
1930-05-01
Procedure for roasting sulphurous minerals and other materials containing sulfur.
ES121978A1
(en )
1931-06-16
Improved procedure for making iron oxide and sulfur dioxide from iron sulfide ores.
DK42324C
(en )
1930-06-02
Procedure for Repairing Damaged Substances.
DK45001C
(en )
1931-12-14
Device for Inventing the Number of Points at Kontraktbridge.
DK46931C
(en )
1933-02-13
Device for Maintaining the Transverse Control of Airplanes.