Patent US1933763 - CHANGING SIGN

Patents

Inventors: Henry M. Russell, Henry M. Russell
Current U.S. Classification: 40/324; 40/453; 40/454; 472/72

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Citing Patent	Filing date	Issue date	Original Assignee	Title
US4655715	6 Dec 1985	7 Apr 1987		Combined coordination trainer and baby bottle holder
US4885856	16 Nov 1987	12 Dec 1989	Panel Graphics, U.S.A., Inc.	Optical prism display device
US5339548	26 Aug 1992	23 Aug 1994		Receptacle display activated after the sensing of the condition of the liquid
US5687497	2 Jan 1996	18 Nov 1997		Fluid vessel amusement