Movable or removable closures – Mounted for optional movements – One closure movable separately from or with other closure
Patent
1986-07-03
1988-01-19
Kannan, Philip C.
Movable or removable closures
Mounted for optional movements
One closure movable separately from or with other closure
E06B 728
Patent
active
047197200
ABSTRACT:
A viewing port for doors such as residences including a light polarizing assembly including at least two linear polarized optical elements, one mounted for rotation with respect to the other element(s) to change the viewing port from light passing to light blocking or reduced transmission condition. The light polarizing assembly is located at the inner side of the door and is surrounded by a tapered portion of its mounting toward the outer face to provide undistorted wide angle viewing of the area surrounding the door. In another embodiment of this invention, my viewing port is designed to be integrated into a stained glass window.
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Kannan Philip C.
Wagner John E.
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