[10] Eight buildings were eventually erected at the Bayshore complex,[10][11] the first two of which (the Old Office and Plant 1) were dedicated in a ceremony on June 25, 1926 attended by dignitaries including Mayor James "Sunny Jim" Rolph.

[10] During World War II, Schlage Lock manufactured shell casings and bomb rail fuses.

[11] After the war, the company supplied lock hardware to the Pan Am Building (1964) and the Bank of America Headquarters (1969) skyscrapers.

[10] In 1974, the year the company was acquired by Ingersoll Rand, Schlage employed 1,600 and was the largest manufacturer in San Francisco.

[13] To settle an environmental lawsuit, the 12.3-acre (5.0 ha) Bayshore factory site was transferred to Universal Paragon Corporation (UPC) from Ingersoll Rand in 2008.

There is no law against duplicating the reverse, numbered or quad-key blanks, which are not patented and are not protected against third-party manufacturing.

The design is licensed to Schlage by Bo Widen of Torshälla, Sweden, the inventor and patent holder.

This variation was a horizontal mirror image of obverse keyways, no longer offered in new key system, and not available with a Primus option.

The odd digits 1, 3, 5, and 7 extend along the left side of the keyway as observed from the lock face from bottom to top.

At the 2013 DEF CON conference, MIT students David Lawrence and Eric Van Albert released a piece of code that allows anyone to create a 3D-printable software model of any Primus key.

With just a flatbed scanner and their software tool, they were able to produce precise models that they uploaded to the 3D-printing services Shapeways and i.Materialise, who mailed them working copies of the keys in materials ranging from nylon to titanium.

[21] In 2013, Schlage launched the Connect deadbolt, a smart lock available in Z-Wave and Zigbee-enabled versions with compatibility with Amazon Alexa and Google Home.

In 2015, it introduced the Sense deadbolt, a Bluetooth-enabled smart lock and its first to support Apple HomeKit.

[25] In 2022, it launched the Encode Plus deadbolt, which was the first smart lock to support Apple's NFC home key standard.

Using a smart-phone or a web-enabled computer, users can monitor and send commands to the Schlage Bridge, which communicates with Z-Wave enabled wireless locks, thermostats, lights, cameras, and other components within the home.