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| Number | Title | Issue Date |
| 5095509 | Audio reproduction utilizing a bilevel switching speaker drive signal Speech and other audio output is produced from a digitally driven speaker which is turned on and off by a digital control signal derived from a digitally sampled audio input. Digitally encoded samples of an audio signal are converted to a sequence of bits... | 03/10/1992 |
| 5087533 | Contact potential difference cell An electrical energy generating device which utilizes the potential difference between two dissimilar materials having different work functions and the ionizing properties of radioactive decay products is provided. A current generating cell includes a pai... | 02/11/1992 |
| 5078038 | Auto harp five finger system A dampening bar assembly comprised of a pair of support blocks held in parallel spaced-apart relationship by a pair of transverse frame members attached between the support blocks at each end of the support blocks forming a rigid rectangular frame. A numb... | 01/07/1992 |
| 5063574 | Multi-frequency differentially encoded digital communication for high data rate transmission through unequalized channels A differentially encoded digital signal waveform is generated as a discrete time representation of a desired analog signal utilizing multi-frequency modulation techniques. The computational capability of present day, industry-standard microcomputers equip... | 11/05/1991 |
| 5038115 | Method and apparatus for frequency independent phase tracking of input signals in receiving systems and the like The output signal of a phase tracking system maintains phase coherence with the dominant input signal while tracking the frequency of that same dominant input signal without additional phase shifting circuitry. Circuitry having a second phase locked loop ... | 08/06/1991 |
| 5030157 | Flying toy having fluid displaceable blades A flying toy for use in short distance indoor or outdoor flight games involving a single player or many players includes a low mass, resilient peripheral tension ring, a lightweight flight surface and an inner ring and may be maintained in flight by repea... | 07/09/1991 |
| 5007920 | Tendon sectioning support clamp A tendon or other smooth muscle support clamp which separates to pass around the tissue to be operated upon and supports said tissue by surrounding it on three sides by the walls and bottom of a channel in the upper surface of a support block is provided.... | 04/16/1991 |
| 4994800 | Snap-in housing for backup alarm An improved housing for an electrically operated vehicle backup alarm for mounting on a vehicle bumper or other structural component in preformed, standard size receptacles. A tubular body fabricated of plastic or nylon composite includes internal mountin... | 02/19/1991 |
| 4992747 | Multiple reuse of an FM band A signal receiving system for receiving messages from each of several unequal amplitude FM carriers occupying the same portion of the frequency band. The signal receiving system receives power division multiplexed signals, each of which being allocated a ... | 02/12/1991 |
| 4985035 | Removable handle for bladed surgical instruments A surgical instrument provides a handle for removably attaching blades having different sizes and different purposes for performing different surgical procedures.... | 01/15/1991 |
| 4972802 | Animal feed dispenser system An automatic animal feed dispenser system comprising one or more batteries of hoppers for temporarily storing feed, each hopper having an outlet adjacent the base thereof through which the feed can be dispensed is provided. Each battery of hoppers is prov... | 11/27/1990 |
| 4961742 | Suture needle holding instrument A surgical instrument for holding a suture needle is provided. The instrument includes handle portions shaped to accommodate the human hand, jaws formed to securely grasp a suture needle and a latching mechanism to hold the device closed so that the physi... | 10/09/1990 |
| 4961400 | Rotating brush aeration system An apparatus for aerating fish ponds utilizes a cylindrical brush mounted for rotary motion below the top of a dam or headwall. Water passing over the dam and falling into a fish pond below the dam falls onto and over the cylindrical brush causing the bru... | 10/09/1990 |
| 4960294 | Truck mud flap support arm A mud flap supporting assembly is provided that allows pivotal movement of mounting arm and mud flap about both the vertical and horizontal axes adjacent to the vehicle to which the arm is attached. A spring connected between the base plate and the end ca... | 10/02/1990 |
| 4944739 | Bone gripping fixation clamp A pliers-like clamping device having offset bone gripping plates temporarily grips and clamps together two bone segments above and below as diagonal cut at an osteotomy site. The device includes a pair of handle members having distal ends which are turned... | 07/31/1990 |
| 4881858 | Tool offset indicator A tool offset indicator for setting up cutting, milling and drilling operations in manually or programmable numerically controlled machines is provided. The tool offset indicator includes a block of insulating material interposed between electrically cond... | 11/21/1989 |
| 4877267 | Truck mud flap arm A mud-flap supporting assembly is provided that allows pivotal movement of mounting arm and mud-flap about both the vertical and horizontal axes adjacent to the vehicle to which the arm is attached. A spring connected between the base plate and the end ca... | 10/31/1989 |
| 4859958 | Multiple reuse of an FM band A signal receiving system for receiving messages from each of several unequal amplitude FM carriers occupying the same portion of the frequency band.... | 08/22/1989 |
| 4829313 | Drive system and filament for a twistable septum in a feedhorn A drive system for a twistable septum in a feedhorn for use in satellite communications antenna systems. The drive system includes a flexible drive rod, coupled to a drive motor, which bends to accommodate off-center coupling with the septum drive wheel.... | 05/09/1989 |
| 4781697 | Removable protective shield for needle sheath A protective shield device for use with medical apparatus and instruments, namely syringes, hypodermic needles and the like, comprising a removable shield which fits snugly over a needle sheath near its open end and extends radially outward and upward to ... | 11/01/1988 |
| 4771978 | Articulated vertical support stand An articulated vertical support stand having an articulated base plate for holding and supporting cut trees or staffs having an irregularly shaped, curved or twisted trunk in a substantially vertical, upright position. A horizontally oriented base plate h... | 09/20/1988 |
| 4748973 | Pneumatic massage device A pneumatic massage device for applying suction to the skin including a suction cup member, a solenoid operated needle valve and a solenoid operated vacuum pump is provided. A pair of positioning straps are attached to the suction cup member to facilitate... | 06/07/1988 |
