The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 1982
Filed:
Jun. 01, 1981
Michael Kohner, Parsippany, NJ (US);
Frank Kohner, Englewood, NJ (US);
The Michael Kohner Corp., Parsippany, NJ (US);
Abstract
A gravity flow display device which is usable for selectively and alternatingly exhibiting two different but conceptually related displays. The device has two thin transparent walled half-hourglass compartments through which displays at their rears are visible. The device further contains non-transparent particulate matter which is capable of flowing from compartment to compartment in response to gravitational force and which is of a sufficient quantity to almost completely fill only whichever of said compartments contains it. When said non-transparent particulate matter is contained within one of the two transparent compartments, the display attached to said compartment is blocked from view. By alternatingly reversing the comparative position of the two compartments a user can cause the particulate matter to flow from the upper compartment to the lower compartment and thus block from view the display at the rear of said lower compartment while causing the display at the rear of said upper compartment to become visible through said latter compartment.