Patent for Modular construction

Apparently, in 1999, a patent was granted for aspects of modular building construction. Given that some of the production details may have been in use prior to the patents grant, enforcement may be difficult. you can find the details here: Patent: US6256960

Modular Units in NYC

No doubt you have heard that an apartment building was erected in New York City using modular units.  Called The Stack, the year was 2013. To meet strict housing codes in NYC, steel studs, rather than conventional wood studs were used.

Here are a few good articles that cover the project:

• This Prefab Building is a First for New York
• More Units Going Up in a Snap - NY Times
• NYC's First Prefabricated Apartment Building

More detailed information on steel modular construction can be found at:
Steel Construction.info - Modular Construction.