THORENSBrand Patent

Patent No.:GB 137508 A

Application Date:1919, 08 30

Registration Date:1920, 01 29

Patent No.:CH 155553 A

Application Date:1931, 05 29

Registration Date:1932, 06 30

Patent No.:CH 167577 A

Application Date:1933, 04 11

Registration Date:1934, 02 28

Patent No.:CH 183014 A

Application Date:1935, 03 04

Registration Date:1936, 03 15

Patent No.:GB 448832 A

Application Date:1936, 01 06

Registration Date:1936, 06 16

Patent No.:EN 800553 A

Application Date:1936, 01 13

Registration Date:1936, 07 08