What was America's first big tech company?
One of America's oldest technology companies, is still one of America's largest.
When I think of technology, I think of IBM, an American multinational technology company with operations in over 170 countries. IBM can trace their roots to the 1890s.
IBM (International Business Machines Corporation) started out in 1911 as the Computing-Tabulating-Recording Company and was renamed "International Business Machines" in 1924.
You can actually go back before that if you count that IBM was the result of a merger of four companies which included The Tabulating Machine Company, which was founded by Herman Hollerith as the Tabulating Machine Company in 1896.
Herman Hollerith invented the tabulating machine, an electromechanical machine designed to assist in summarizing information stored on punched cards developed to help process data for the 1890 U.S. Census.
Well, there is a choice on this depending on how you want to define "tech"
Western Union and the other telegraph companies (Postal Telegraph, etc.)
AT&T (AKA Bell Telephone) and the other telephone companies
Edison General Electric, later just General Electric
On the chemical side, there is DuPont.
For the first consumer "tech" product, the best choice would be Kodak. which made both cameras and film
Thomas Edison established the Edison General Electric Company in 1890.