GB530383A
(https= )
US2158066A
(en )
1939-05-16
Typewriter
US3280957A
(en )
1966-10-25
Variable line spacing device for typewriters
US3696906A
(en )
1972-10-10
Character selecting device for a printing mechanism
US1132558A
(en )
1915-03-23
Type-writing machine.
US1245300A
(en )
1917-11-06
Combined type-writing and computing machine.
GB1285317A
(en )
1972-08-16
Dividing mechanism
SE308531B
(https= )
1969-02-17
GB514973A
(https= )
GB1218505A
(en )
1971-01-06
Printing device for serially printing numerical or alphanumerical characters
US1964975A
(en )
1934-07-03
Calculating machine
GB1453546A
(en )
1976-10-27
Variable gear transmission system for a pedal car to be propelled by the driver with or without the aid of a passenger
US1246009A
(en )
1917-11-06
Combined type-writing and computing machine.
US1770903A
(en )
1930-07-22
Recording apparatus
US2644639A
(en )
1953-07-07
Carriage shifting mechanism
US3833107A
(en )
1974-09-03
Typewriter
US3616994A
(en )
1971-11-02
Printing device in a recording calculator or the like
US1156464A
(en )
1915-10-12
Type-writing machine.
US1352229A
(en )
1920-09-07
Typewriting-machine
US2335226A
(en )
1943-11-30
Calculating machine
GB374109A
(https= )
US1265155A
(en )
1918-05-07
Combined type-writing and computing machine.
US1277130A
(en )
1918-08-27
Change-speed gear.
GB161848A
(https= )
US1260281A
(en )
1918-03-19
Combined type-writing and computing machine.