75496888
Jun 5, 1998
electric and scientific apparatus; namely, an apparatus used in support of teaching science subjects in the form of a see-into and/or a see-through, variable volume and size-and-shape reconfigurabe using flexible tubing, tank and which tank has two, a front and a rear, substantially planar walls at least one of which is transparent, and kit of components for use therewith
Electrical and Scientific Apparatus