Von Duprin was started in 1908, when it introduced the first "panic release bar" in response to a need for protecting life safety while providing security, a purpose that still guides the firm today. Indianapolis hardware salesman Carl Prinzler missed a scheduled visit to Chicago's Iroquois Theatre in 1903, thus escaping a disaster in which 594 people perished when the "fireproof" theater burned. Obsessed with the needless loss of lives, Prinzler was determined to solve the problem of public buildings that often turned into death traps when doors were locked to keep gate crashers out. Prinzler teamed up with his neighbor, Henry DuPont, an architectural engineer, who invented the first working device. The initial model, introduced in 1908, was marketed by Vonnegut Hardware Company under the name Von Duprin, a contraction of Vonnegut, DuPont and Prinzler.

Currently, Von Duprin manufactures the widest range of exit devices and outside trim operations, including rim-type and mortise lock, surface and concealed vertical rod, fire-rated and several electrical options. Security-related products include a full line of electromagnetic locks, electric strikes, card readers, and keypad-type access control systems.

History of Product Innovations:

1935 - Drop Forging
1953 - Concealed vertical rod device for wood doors, Series 55
1953 - Latch-Track threshold
1957 - Reversible exit device, Series 88 Rim
1959 - Aluminum mullion
1961 – Stainless Steel Exit Device, Series 66
1962 – Concealed Vertical Rod Device for metal doors
1972 – Pushpad Exit Device, narrow stile, Series 33
1973 – Electric Latch Retraction EL33
1979 – Wide Stile Exit Device, Series 99
1993 – Break-away Lever Trim
1996 – Self-contained Delayed Exit Device, CX Chexit
1999 -- Recessed INPact Exit Device
2006 -- XP98/99 Exit Device with new Latch Bolt feature