Marie Van Brittan Brown and her husband, Albert, filed for the patent in 1966 and received approval three years later.

In many cases, all it takes to keep a burglar out is a locked door. But some burglars may try one of these more creative methods to break into your home. “The overwhelming number of burglars are ...

Abstract: In this paper, we have developed a door analysis program which is pneumatically mechanised controlled by Lab- View programming to analyze the performance of the door. The impact test ...