Last Updated on April 3rd 2008.
Acumath
| Acumath 150 | Acumath 1311 |
Aero Products Research
| APR CR-4 Circular |
Allegheny Plastics
| Allegheny Circular |
ALRO
| ALRO | ALRO 200R |
| ALRO 1010 Commercial |
Alvin
| Alvin Elite Multilog 1151 | Alvin Elite Vectorlog 1157 |
Appoullot
| Appoullout Circular |
Aristo
Aston
| Aston Boxwood Proof Rule |
Aston & Mander
| Aston & Mander Artillery Rule | Aston & Mander Sector |
Blundell
Boots
| Ringplan Log Log |
George Bousfield
| Vade Mecum |
British Engraving and Nameplate Manufacturing
| Bonwitt Circular |
Bruning
| Bruning 2420 |
Casella
| Anderson's Improved Slide Rule |
Charpentier
| Calculimetre |
Charvoz
| Charvoz Trig-O-Log SR3 |
Chatelain
| Boucher |
Circulator
| Circulator |
Classic
| Series 1 |
Compass
| Compass 1321 |
Concise
| Concise Circular 600 | Concise Stadia |
Controller
| Controller Circular |
Corona
| Corona 1 Circular |
C-Thru
| C-Thru S889 | C-Thru Circular |
| Unknown |
Damien
| Damien |
Dargue
| Dargue Simplon SR-10 Bi-Lateral | Dargue Simplon XL-10 Log Log |
| Dargue Simplon Bilateral |
Deeva
| Deeva 720 Polylog | Omega 797 Studio |
Dempster
| RotaRule |
Dennert and Pape
| Dennert and Pape | Dennert and Pape Mannheim |
Dicas
| Dicas Ivory Proof Rule |
Dietzgen
| Dietzgen Binary Circular | Dietzgen N1725 |
| Dietzgen Microglide 1734 | Dietzgen 1741 |
Diwa
| Diwa Teknilog 710 | Diwa 901 |
| Diwa 930 |
Dring and Fage
| Dring and Fage Proof Rule | Dring and Fage Proof Rule |
Durer
| Durer 5970 |
Ecobra
| Ecobra 153 | Ecobra Cosmos 154 |
| Ecobra Cosmos 1711 |
Elektron
| Elektron 25 |
Walter Evans
| Spirule |
Everard
| Everard Boxwood 4-Slide Rule |
Faber Castell
Farmar
| Farmar's Rule | Farmar's Rule Variation 1 |
Fearns
| Fearns Circular Rule |
Felsenthal
| Felsenthal Circular |
Fowler
| Fowler Junior | Fowler Long Scale |
| Fowler Magnum | Fowler Magnum Variation 1 |
| Fowler Jubilee Magnum | Fowler Textile |
| Fowler Twelve Ten | Fowler Universal |
Fuji
| Fuji 1280 |
Fuller
| Fuller Type 1 | Fuller Type 2 |
| Stanley Complex Number (Whythe) |
Fullerton
| Fullerton Concise 300 |
Gerber
| Gerber Variable Scale |
General Electric
| Radiation |
Gilson
Graphoplex
| Graphoplex 1614 | Graphoplex 690 |
| Graphoplex 690a | Graphoplex 691a |
| Graphoplex 692b Neperlog | Graphoplex 694 |
| Graphoplex 695 | Graphoplex 698 |
| Graphoplex Koh-I-Noor Koh-I-Log 10000 | Roplex Circular |
Halden
| Halden Calculex |
Heath
| Hezzanith Carmody Navigational |
Helix
| Helix U 15 |
Hemmi
| Hemmi 255-D | Hemmi 259-D |
| Hemmi 260 | Hemmi P262 |
| Hemmi P281 | Hemmi 1771 |
| Hemmi Unknown | Hemmi Unknown |
Hope
| Hope 530 |
Huet
| MG 240C Circular |
Intra
| Intra 1081 |
IWA
| IWA Circular 1638 | Iwamatic 1660 |
Jackson
| Jackson |
Jakar
| Jakar 29 | Jakar 99 |
Jason
| Jason 803 |
Jorgensen
| Jorgensen Circle |
Kent
| Kent 7153LL |
Keuffel and Esser
| K and E 4061T | K and E 4083-3 |
| K and E 4083-3 Variation 1 | K and E 68-1100 Decilon |
| K and E 68-1210 | K and E 68-1400 Analon |
| Sector | Thacher Cylindrical 4012 (Type 2) |
| Thacher Cylindrical 4012 (Type 3) |
Layfay
| Lafay Helice No. 2 |
Lafayette
| Lafayette 99-70559 | Lafayette 99-7055 14 |
| Lafayette 99-71029 | Lafayette VectorLog F-686 |
Lawrence
| Lawrence 10-B |
Loftus
| Loftus Boxwood Proof Rule |
Loga
| Loga Cylinder | Loga 30 Tt Circular |
| Loga Modell R Circular | Loga 75T Circular |
Logarex
| Logarex 27602-2 | Logarex 27607-1 |
Logomat
| Logomat 2300 |
Lord
| Lord's Calculator |
Lovelace
| Nuclear Bomb Effects Computer |
Lutz
| Lutz 102 S | Lutz 151 |
| Lutz 252 |
Marcantoni
| Marcantoni 25 |
Mas
| Mas 346 |
Mear
| Rotoscale |
Meissner
Meissner Record  | Meissner Variant |
Micador
| Micador 60 |
Military
| Military 105mm Howitzer | Military Circular |
Monroe
| Monroe Mechanical Pencil |
Nestler
| Nestler 0210 | Nestler 0292 |
| Nestler Radiation | Nestler Cylindrical 3.75M |
Norma
| Norma Grafia 190 | Norma Merkuria 190 |
Olson
| Olson TL-472 |
Otis King
| Otis King | Otis King Variation 1 |
Patco
| Patco Mark IV Data Log |
Pickett
| Pickett Model 17 Radiation | Pickett 600MES |
| Pickett 803ES | Pickett 904ES |
| Pickett B-1 | Pickett N4T |
| Pickett N4pT | Pickett N600T |
| Pickett N3pT | Pickett N3T |
| Pickett Circular 110 ES | Pickett Circular 111 ES |
Post
| Versalog |
PSL
| PSL 2-428 Log Log |
Radiac
| Radiac abc-m1a1 | Radiac abc-m4a1 |
Reiss
| Reiss 3214 Record | Reiss 3223 Progress |
| Reiss 3227 |
Richardson
| Direct Reading | Pantocrat |
Ross
| Ross Precision Computer |
Royal
| Royal 1091 | Royal 5091 |
Russian
| Russian 1 | Russian 2 |
| Russian 3 | Russian KL-1 Circular Rule |
Sans and Streiffe
| Sans and Streiffe 311 | Sans and Streiffe 312 |
Scientific Instrument Company
| SIC Relay 151 | SIC 1510 |
| SIC 1580 | SIC 1610 Circular |
| SIC 1610 D Circular |
Scientific Publishing Co. (Later Fowler)
| Pocket Watch |
Sexton
| Sexton's Omnimetre | Sexton's Omnimetre Variation 1 |
Shanghai
| Flying Fish 1002 | Flying Fish 1003 |
| Flying Fish 1004 | Flying Fish 1009 |
| Flying Fish 1013 |
Simplon
| Dargue Simplon SR-10 Bi-Lateral | Dargue Simplon XL-10 Log Log |
| Dargue Simplon Bilateral |
Skala
| Skala Elektro |
Small
| Small Calculator Model 1 |
Staedtler
| Staedtler 54428 | Staedtler 94424 |
Standardgraph
| Standardgraph Circular 900 | Standardgraph Circular 910 |
| Standardgraph 9982 Stanno-Log |
Stanley
| Fuller Type 1 | Fuller Type 2 |
| Stanley Complex Number (Whythe) |
Sterling
| Sterling 594 | Sterling Log Log |
Stephens
| Supremathic Circular |
Supreme
| Supreme |
Tavernier-Gravet
| Tavernier-Gravet | Tavernier-Gravet |
Technical Sales
| Emblem 1081 | Emblem 1091 |
Thacher
| Thacher Cylindrical 4012 (Type 2) | Thacher Cylindrical 4012 (Type 3) |
| Thacher Reproduction |
Thomlinson
| Thomlinson's Paper Rule |
Thornton
| Comprehensive AA0010 | Thornton P271 |
| Thornton Junior Student | Thornton PIC Engineer's F3649 |
| Thornton F5100 Radiation |
Troger
| Troger Circular |
Unique
| Unique Brighton | Unique Electrical |
| Unique Log Log | Unique Universal |
| Unique Universal One | Unique Universal Two |
U.S. Army
| U.S. Army Radiac |
UTO
| UTO 503 | UTO 503 Variation 1 |
| UTO 561 | UTO 631U |
| UTO 901 | UTO Studium 930 |
| UTO 931U | Charvoz UTO-932 |
| UTO No. 1 | UTO No. 1 Variation 1 |
| UTO Navigation |
VEB
| VEB Mantissa Trim LL |
Weems and Plath
| Tyler |
Weil
| Weil Polylog 1140 |
W H Smith
| W H Smith Log Log Trig | W H Smith Master Duplex A505 |
W & G
| W & G Dualface 432 |
Wolters-Noordhoff
| Wolters-Noordhoff 112 | Wolters-Noordhoff 650 |
| Wolters-Noordhoff 1200 |