Published by Primary Source Microfilm

The Thomas Register offers convenient access to this renowned reference for U.S. products, services and companies for the years 1905 to the present. It allows users to trace the impact of certain products, industries and manufacturing processes on the development of America and its economy, and on the social changes resulting from improvements in manufacturing technology.

Each annual listing of the Thomas Register includes three major categories providing vital information on American industry:

• Products/Services lists in alphabetical order thousands of specific products and services. Illustrated product advertisements display detailed information on availability and supplies
• The Company listing provides information about specific companies including addresses of sales offices, distributors, plants, service/engineering offices, divisions and subsidiaries, complete product lines, brand names, corporate affiliation and asset ratings
• The Thomas Register Catalog File, known as THOMCAT, contains data from nearly 1,000 companies with detailed specifications, engineering drawings, photographs, performance and availability data and other essential buying and specifying information. Arranged alphabetically by company name, this file is cross-referenced with the Product/Services file

The Thomas Register, 1905-1938: Guide to the Microfilm Collection is provided with each order for this portion of the collection. Indexing for the years 1939 to the present appears on the microfilm in the form of section identifiers on each frame.

Ongoing Collection (1905-2000): Approximately 584 reels

Available in 16mm only
Annual subscription available
Approximately 33 reels/year