Abstract: An improved pet brush having a handle of generally hexagonal cross-section with three relatively long sides interspersed with three relatively short sides extending upwardly from the brush head at an angle of approximately 10°-30° and having a thumb rest located at the juncture of the handle with the base on the upper surface of the handle, and a head of generally triangular, yet arcuate configuration formed with a single row of bristles extending along the periphery of the head.

Abstract: This invention provides a tool for effective removal of mats of hair in the coats of fur-bearing animals. The tool is particularly effective in removing mats from long-haired dogs, while preserving most of the original hair in the original length. The tool consists of a handle and a set of blades suitable for cutting and combind the mats. The blades cut the mat into narrow strips in a single operation, while tines attached to the blades rake or comb the uncut hair in the strips and remove the cut hair. The blades present a smooth, non-cutting surface to the animal's skin, and provide for easy removal of the accumulated hair from the tool. The animal's comfort and the required grooming time are improved, as compared to prior grooming practice.

Abstract: A pulse modulator including a pulse forming network comprising a multiple section ladder network of series inductors and shunt capacitors. The series inductors are flat, spiral inductors etched on microstrip. The pulse forming network is charged negatively through an IMPATT diode, and is switched to ground by a set of p-channel VMOS power FETs. By switching off the FET switches before the pulse forming network is completely dicharged, the fall time of the current pulse is reduced. The shape of the current pulse can be adjusted by varying the impedance of the section or sections of the pulse forming network whose position in the network corresponds to the position in the current pulse which it is desired to change. The variation in impedance is realized by bringing metallic slugs, mounted in the housing of the pulse forming network, into proximity with the flat, spiral inductors.