The Biddle Hardware Company was established in 1837 by Robert and William C. Biddle, brothers that originally called their firm R. & W. C. Biddle. That name was changed to R. & W. C. Biddle & Co. after the sons of Robert and William joined the firm. Clement M. Biddle was the son of Robert and he became a partner on January 1, 1865 after working for the firm since 1861. His cousin Charles M. became a partner in 1866.
In 1866 the firm name was changed to Biddle Hardware Co. They were the first hardware house that adopted the words "Hardware Company" in their name but in fact they remained a family concern. The principals were Robert, William C., Clement M. and Charles M. Biddle.
In 1872 the founding Biddles retired and the firm was taken over by Charles M. and Clement M. Biddle. That arrangement only lasted one year and in 1873 Charles bought out his cousin Clement and became the sole proprietor of the business.
In 1873 Edward Knight commenced working for the Biddle Hardware Co. During the next 17 years he worked in practically every department of the company including that of traveling salesman. In 1890 Edward Knight became a partner. Two years later, in 1892, Charles M. Biddle, Jr. and Robert Biddle, 2nd, each received an interest in the firm after having started in 1898 and 1899 respectively.
By the time the company issued its first general catalog in 1910, the company had been in business 73 years. Sometime within the next decade, possibly in 1919, the Biddle Hardware Co. joined with the Supplee Hardware Company and the firm of Supple, Biddle Hardware Co. was formed.