October 15, 1891 the company was incorporated as Pratt & Englund Company in Chicago, Illinois as a manufacturer of portable streetcar fare registers.
Company name is changed to the International Register Company (IRC) with the purchase of the New Haven Car Register Company.
Became leading fare register manufacturer in the United States.
Company president Arthur Woodward invents wind vine sight for machine guns for combat in World War I
Began manufacturing Coin Meters. This was the company’s introduction to clock-actuated devices, which was the precursor to the world-renown world class timers.
Began manufacturing 20 mm shells, producing over 20 million during the course of the World War II, along with aircraft controls and other munitions items.
The first time switch the “Inter-Matic" is introduced and rapidly accepted due to the high quality and low price. The “Inter-Matic” time switch was used to control electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners.
Introduced its first consumer timer product, the Time-All, which controlled various household lights and devices. The Time-All is still manufactured today.
Company foundation in St. Georgen Schwarzwald by Dieter Grässlin – Vision: Part-assembly of clockworks.
IRC introduces the world-renowned T101 mechanical time switch; it still remains a vital component in the mechanical time switch industry.
Grässlin introduces its first product, an hour counter.
IRC introduces pool and spa controls line to the industrial market. The pool and spa control line remains a valuable product line today.
The IRC Spring Grove office opens. This is the current location of the company headquarters.
Grässlin first produces time switches.
IRC reaches $15 million in sales.
Grässlin produces first DIN-rail products
Grässlin opens new factory building in St. Georgen, Germany.
International Register Company is officially renamed Intermatic Incorporated.
Intermatic opens a new distribution center in Richmond, Illinois.
The company reaches almost $100 million in sales, and acquires two new lines--industrial surge and professional landscape lighting products.
Intermatic acquires <a href="/en/grässlin">Grässlin Controls Corp</a> (GC), a leading international manufacturer of time switch technology, light and temperature controls, and tariff time switches.
Grässlin by Intermatic introduces LAN and power technology.
Intermatic launches a new line of energy-saving, web-based controls with the ET90000 Series. Intermatic also begins offering a wider variety of energy saving products, including Occupancy and Vacancy Sensors.
Grässlin by Intermatic introduces the talento pro series.
Grässlin by Intermatic introduces the talis line of movement and presence detectors.
Grässlin by Intermatic relaunches the successful talento TOP as talento TOP pro.
Intermatic celebrates 125 years in business.
The Grässlin division celebrates 60 years in business.