SIP systems were used by Woods Constructors of Santa Paula, California in their homes and apartments from 1965 until 1984. This work was the basis for John Thomas Woods, Paul Flather Woods, John David Woods, and Frederick Thomas Woods when they used a similar concept to patent the Footing Form for Modular homes (US Patent #4817353) issued on April 4, 1989. Numerous homes in Santa Paula, Fillmore, Palm Springs, and surrounding areas use SIPs as the primary method of construction. The design was awarded approval from (then) ICBO and SBCCI, now ICC.