Mechanical Calculators Manufacturer Database


Total brands in database (20 May 2024) : 1345
Corresponding brands from query : 31

Selection by country
Types legend & selection
Addiators (A)
Differential (D)
Electrical (E)
Mechanical (M)
Slide-rules (S)
Undefined (?)

Brand/Manufacturer


Brand
Manufacturer
Origin
First
Last
Type
Info
O
O.K.E
ARG
-
-
S
-
OAO Kalibr
RUS
-
-
S
Oerlikon-Bührle & Co.
SWI
1906
act.
E
-
Ohico
HOL
1930s
-
S
Ohmoto Tekko (->Tiger )
JAP
<1923
-
M
Oliver Co.
AUT
-
-
M
-
Olivetti Industria
ARG
-
-
M
-
Olivetti Underwood
Olivetti
USA
1950s
-
M
-
Olpimatic
GER
1950s
-
M
-
Olson
Relay/Ricoh
USA
-
-
S
Olympe
?
1958
-
M
Olympi
Olympia-Werke AG
GER
1948
-
M, E
Omaro
FRA
1928
-
S
Omega
Wescosa
USA
-
-
A
-
Omega
Relay/Ricoh
USA
-
-
S
Optima
Dr. Albert Hauff
GER
1910
-
S
Optische Antstalt C.P. Goerz AG
GER
1921
-
A
-
Optischen Maschinenbaum-Industrie AG (OMIAG)
GER
1924
-
M, S
-
Orga AG
GER
1920
-
M
Orga-Constant
Maschinenbau Koch
GER
1921
-
M
-
Oriette
?
1957
1959
M
-
Orions
?
-
-
S
Orlin
?
1892
-
M
-
Oslo University
NOR
1938
1942
D
Otis King
Carbic, Ltd.
UK
<1940
>1950
S
Ott, Albert
GER
1938
-
D
-
Ott, Max
GER
-
-
?
-
Otto Holzapfel und Cie.
GER
1914
1953
M
Otto Meuter & Sohn
GER
1928
1973
A
Oxner Rechnemaschinen-Fabrik
SWI
1951
1954
M
-
Ozone
?
-
-
S
-


(c) epocalc 2012