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Mechanical Calculators Manufacturer Database
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Brand
|
Manufacturer |
Origin |
First |
Last |
Type |
Info |
|
| R | |||||||
 | R.C. Allen Businesss Machines | USA | 1932 | >1950 | M |  | |
| Radio Corporation of America (RCA) | USA | - | - | S |  | |
 | Raffy | FRA | - | - | S | - | |
 | Rallymat | ? | >1950 | - | E | - | |
| Ramsayer (Technischen Hochschule Stuttgart) | GER | 1955 | - | M | | |
| Rapid Calculator | Allen Wales | USA | 1923 | 1927 | M | - |
| Rapid Calculators Co. | USA | - | - | A | - | |
| Rapid Computer Adding Machine | USA | 1893 | - | M | - | |
| Ray Adding Machine | USA | 1905 | 1924 | A | - | |
| Ray Calculator Co. | USA | <1960 | - | A | | |
| Ray Subtractor-Adder Co. | USA | 1916 | 1917 | A | - | |
| Rechenmaschinenwerk Herzstark & Co. | AUT | 1908 | 1925 | M | | |
| Rechnenmaschine Gesellschaft | GER | - | - | M | - | |
| Rechnitzer, Alexander | AUT | 1906 | - | E | | |
| Record | Nordhammer Rechnenmaschine, Meuter | GER | 1913 | 1956 | A | |
| Recta | Beaucourt, Hughes | FRA | 1910s | - | M | - |
| Regent-Feinbau | GER | 1949 | 1958 | M | | |
| Regina | Hebecker & Taetzel | GER | 1925 | 1968 | M, E | |
| REGINA-Rechenmaschinen Heinrich Holz | GER | - | - | M | - | |
| Regna Oy | FIN | 1960s | - | M | | |
| Reiss GmbH | GER | 1968 | - | S | | |
 | Relay | San-Ai Measuring Instruments | JAP | - | - | S | |
| Reliable Typewriter & Adding Machine Corp. (RTAM) | USA | 1927 | 1950 | A | - | |
| Rema | Braunschweig Rechnenmaschine-Fabrik Rema | GER | 1915 | 1956 | M | - |
| Remington | USA | 1960s | 1968 | M, E | - | |
| Remington-Rand, Inc. | USA | 1927 | 1932 | M, E | | |
| Renown | ? | - | - | ? | - | |
| Reports | ? | 1950 | - | M | - | |
| Result | ? | 1940s | - | M | - | |
| Resulta | Paul Brüning | GER | 1911 | 1967 | M, E | |
| REWA | GER | ~1910 | - | S | | |
| Rex-Rotary Int. Comp. A/S | DEN | - | - | M, E | - | |
| Reybaud (RéBo) | FRA | 1925 | 1930 | A | - | |
| Reynal, Camille | FRA | 1925 | - | S | | |
| Rhei-Ta | JAP | - | - | S | | |
| Rheinische Metallwaren- und Maschinenfabrik Sömmerda AG | GER | 1928 | - | M | | |
| Rheinmetall GmbH | GER | 1924 | 1965 | M, E | | |
| Richard Müller A/S | DEN | <1950 | - | M | | |
| Richardson | USA | - | - | S | | |
| Richer | FRA | 1874 | - | S | | |
| Ricoh Company Ltd. | JAP | <1960 | >1984 | E, S | | |
| Rista | GER | 1960s | - | S | | |
| RIV Officine di Villar Perosa | ITA | 1906 | 1961 | M | | |
| Robert Kling GmbH | GER | 1918 | 1975 | M | | |
| Roberts, Edward | UK | 1750s | - | S | | |
| Robinson | ? | - | 1925 | M | - | |
| Robinson, Tim | USA | 2005 | - | D | | |
| Robjohn, Wiliam | USA | 1872 | - | M | - | |
| Rokli | Robert Kling GmbH | GER | 1949 | 1975 | M, E | - |
| Rolls Record | GER | - | - | S, A | - | |
| Romana | Italcalcolo S.A. | ITA | 1939 | - | M | - |
| Romanoni | Remington | ITA | <1958 | - | M | |
| Roos Co. | USA | 1930s | - | S |  | |
| Rosseland, Svein (-> Oslo University) | NOR | 1942 | - | D | | |
| Roth, Didier | FRA | 1841 | - | M | - | |
| Royal | Ushida Yoko Co., Ltd. | JAP | 1960s | - | S | |
| Royal | Litton | UK | 1950s | - | M | |
| Royal McBee Corp. | USA | - | - | M | - | |
| RPGP | BUL | 1970s | - | S |  | |
| Rudolf Schweizer & Cie. | SWI | 1936 | - | A | | |
| Runge, Eduard | GER | 1896 | - | A | - | |
| Ruthardt & Co. GmbH | GER | <1927 | - | M | | |
| Ruxton Multi-Vider Corp. | USA | 1929 | - | S | | |
| Ruyi | Sida | CHN | - | - | S |  |
(c) epocalc 2012