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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 4889522 | Rotary bag making machine for drawstring bags The rotary bag making machine of the present invention is adapted to make side seal bags having a plastic drawstring through a hem in the top of the bag. More specifically. The rotary bag machine of the present invention includes a two part, elongate seal... | 12/26/1989 |
| 4865748 | Method and system for variable frequency electromagnetic water treatment A method and system for utilizing variable frequency electromagnetic energy to inhibit, prevent, reverse, or alter the formation of rust or scale on various liquid contacting surfaces is disclosed. Initially, electromagnetic test signals of varied frequen... | 09/12/1989 |
| 4865747 | Electromagnetic fluid treating device and method An electromagnetic field treating device includes a conduit formed of nonmagnetic material having an inlet and an outlet such that fluid can pass through the conduit in a direction which is parallel to the axis of the conduit, and a ferromagnetic core whi... | 09/12/1989 |
| 4811250 | Deviation measurement system A system is disclosed for determining the positions of a set of points on a body and comparing those points to a set of reference points. The system includes a data acquisition apparatus comprised of emitters, receivers, and microprocessor controls. The e... | 03/07/1989 |
| 4775163 | Motorcycle A motorcycle has a frame, a front wheel and Y-shaped rockers attached to the axle of the front wheel on either side. Also attached to each rocker is a rigid fork which directly connects the rocker to the frame of the motorcycle and a springed fork which c... | 10/04/1988 |
| 4753259 | Adjustable folding walking aid A hinge element consists of a tube connector attached to the end of a tube, the end of the tube connector having a notched head portion. Pivotably attached to the notched head of the connector is a bracket element having a spherically shaped, notched end ... | 06/28/1988 |
| 4747423 | Adjustable and reducible walking aid and method of using same A reducible walking aid is disclosed that incorporates three bitubular sections in slidable engagement with one another in the preferred embodiment. The first and third sections are connected via a pair of elastic cables attached to slidable, bidirectiona... | 05/31/1988 |
| 4744285 | Alternating valve An automatic, hydraulically actuated, sequencing valve for use with a pair of hydraulic acutators (e.g. double acting hydraulic cylinders) includes a valve body having a cylindrical bore therein. Cam members at either end of the bore are engaged by pins o... | 05/17/1988 |
| 4735502 | Reusable plastic cuvette array A rotatable cuvette array made of PETG plastic for mixing two substances has a circular lower section with a number of circumferentially spaced cuvettes each having inner and outer compartments, both of which have upwardly diverging walls, and a ramp sepa... | 04/05/1988 |
| 4243883 | Blood hematocrit monitoring system A system for continuously monitoring and/or controlling blood hematocrit levels is disclosed. The system includes a photometric hematocrit sensor which is coupled to a linear response meter, and in one embodiment a separate sensor is coupled to a three-wa... | 01/06/1981 |
| 4001198 | Method of recovering nutrients from cheese whey and purifying the effluent Dry food quality protein and lactose powders are produced from cheese whey by sequential ultrafiltration processes, each of which removes as permeate substantial amounts of water and dissolved solids from the respective concentrates. In the initial protei... | 01/04/1977 |
| 3947024 | Tiretoys Children's playground toys constructed from used tires are coated with an epoxy resin coating which is resistant to abrasion, temperature fluctuations and which adheres firmly during flexing and stretching of the tires during use. The coating enhances the... | 03/30/1976 |
