GB631441A
(enExample )
US3845280A
(en )
1974-10-29
Digital computer and form reader for inventory control and recording cash transactions
GB1603250A
(en )
1981-11-18
Change calculating apparatus
CN113326225B
(zh )
2025-07-11
数据印刷控制装置及其方法、存储介质、电子计算器
US2337091A
(en )
1943-12-21
Calculating machine
US1794464A
(en )
1931-03-03
Combined typewriting anb computing machine
US2692726A
(en )
1954-10-26
Calculating machine function
US2063740A
(en )
1936-12-08
Calculating machine
US3146941A
(en )
1964-09-01
Combined typewriter and calculator
GB1453607A
(en )
1976-10-27
Adaptable programmed calculator
US2813611A
(en )
1957-11-19
Front peed and operation control mechanism
JPS57771A
(en )
1982-01-05
Electronic cash register
US2316520A
(en )
1943-04-13
Accounting machine
US1814009A
(en )
1931-07-14
Cash register
US1493867A
(en )
1924-05-13
Combined typewriting and computing machine
US2238508A
(en )
1941-04-15
Cash register
GB681027A
(enExample )
US2251099A
(en )
1941-07-29
Symbol printing mechanism for accounting machines
Mao et al.
1967
Analysis of Investment Returns by Computer
JPS56114065A
(en )
1981-09-08
Totalizing system based on time band
US1881852A
(en )
1932-10-11
mueller
GB668841A
(en )
1952-03-26
Improvements in indicator devices for cash registers and like accounting machines
JPS55103669A
(en )
1980-08-08
Electronic cash register
GB1014391A
(en )
1965-12-22
Improvements in arithmetic units for digital calculators and the like
GB443977A
(enExample )