Portrait of Carl Prinzler, inventor of the Von Duprin exit device.

View inside of the final Schlage Lock Company factory, Bayshore Boulevard, San Francisco.

Schlage lockset designed for a closet

Walter Schlage at the first Schlage factory on Shotwell St., San Francisco.

A screenshot of the 2025 50th Anniversary timeline website, celebrating Total Door Systems’ 50 Years of Innovation. The website may be viewed at https://TotalDoor.com/50th-anniversary

A graphic illustration of the 2020 Total Door Systems introduction of SafeFrame®, a completely integrated smoke containment system that exceeds the testing and rating requirements for elevator hoistways and eliminates the need for elevator lobbies.

A screen still of the 2019 launch of the Total Door Systems DoorBuilder SaaS tool, a proprietary configuration tool that streamlines quoting and configuration of our integrated door systems.

In 2018, Patricia Yulkowski was elected President of the Builders Hardware Manufacturers Association (BHMA), serving a two-year term. Yulkowski is a champion of independent manufacturers.

Graphic still of the 1975 innovation that made a Total Door a Total Door, including its unique full-height, locking channel. Full-Height Locking Channel Total Door Systems’ proprietary full-height locking channel acts as a 5/8-inch deadbolt along the full length of the door. Its I-beam shape rotates when open and snaps shut along the full length when closed.