Abstract: A small-sample dialyzer having dialysis cells comprising a plastic tube covered on one end with a dialysis membrane, the dialysis cells being mounted in a cell holder positioned to place the membrane on the cells in contact with the liquid in the container into which an ingredient in the sample is to dialyze. The dialysis process may take place without external agitation, with agitation by magnetic means, or, agitation by means of a linear shaker apparatus.

Abstract: A manipulative cube puzzle having at least one horizontal tier of cubes in which the cubes may be slid, rotated or tumbled at the option of the player, the cubes being marked on at least part of the faces with various colors, letters, numbers, designs or symbols in order to permit the player to arrange the cubes in combinations of varying complexity.

Abstract: A prosthetic horseshoe for use in the treatment of the affliction known as chronic laminitis in which the coffin bone in a horse's foot rotates from its normal position. The prosthetic horseshoe has an adjustable pin designed to rotate the coffin bone back to its normal position and hold it there during treatment of the affliction.

Abstract: A portable boat hull scrubber for detachably mounting onto a boat and adapted to scrub the adhering debris from the underwater portion of the hull, said scrubber functioning with the boat stationary in the water.

Abstract: A dental articulator for mounting and adjusting paired dental casts; said articulator having at least one protruding locating pin entering an aperture in the base of each dental cast and having fastening means other than conventional mounting plaster for releasably retaining the dental casts in their mounted position; and further having means for adjusting the upper dental cast in centric anatomical relationship with the lower dental cast.

Abstract: A metallic base dental prosthesis having an improved fit resulting from the cavity and rim portions of the prosthesis being finish machined by electric discharge machining (EDM).

Abstract: A moated pet feeder of the type which combines a food bowl and a water bowl; the food bowl being surrounded by a moat cavity which fills with water flowing through a substantially horizontal passage connecting the moat cavity with the water bowl to thereby form a moat which ants and other crawling insects will not cross to gain access to the food in the food bowl.

Abstract: A dental articulator for mounting and adjusting paired dental casts without the use of mounting plaster by means of contoured locating stops engaging suitable cavities formed by cutters in the base of the casts; the articulator being adapted for the rapid removal of, and the remounting of the casts to their originally adjusted positions in the articulator.

Abstract: 1. A real time signal correlator for use on high resolution mapping radar apparatus aboard a moving aircraft having a ground speed indicator and comprising on an optical axis in the order named: A time modulating light source, a first cylindrical lens, an optical filter having at least one optically apertured time variable function and located to be substantially at the imaging plane of said first cylindrical lens, a second cylindrical lens optically parallel to said first cylindrical lens, and an optically sensitive film substantially at the imaging plane of said second cylindrical lens normal to the optical path and movable in a direction parallel to the time variable function on said optical filter, the linear velocity of said film being synchronized to the ground speed indicator on the aircraft so that when the time function of said modulating light source is identical with the time variable function of said optical filter the two time variable functions are correlated and impressed upon said film.