Doorway security system
Identification of gemstones by relative reflectance measurements
Latching mechanism for chamber access door
Locking device to arrest a displaceable member such as a door or
Magnetic doorstops and handtruck holsters
Portable doorstop with ergonomic advantages
Portable handled door stop
Portable portal lock
Portable window stop
Safety door latch
Safety door stopper
Security device
Security door block
Security door stop
Stop assembly
Two piece portable doorstop
Ventilation stop for windows
Wedge couple for blocking-up and fixation of windows and doors
Window wedge