Patents Represented by Law Firm Woodcock, Washburn, Kurtz, Machiewicz & Norris
  • Patent number: 5508463
    Abstract: Novel .alpha.-aminophosphonates are provided along with processes and intermediates for their preparation. In preferred embodiments, scalemic .alpha.-aminophosphonates are prepared by the stereoselective addition of phosphite salts to chiral imines.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: April 16, 1996
    Assignee: Trustees of the University of Pennsylvania
    Inventors: Amos B. Smith, III, Kraig M. Yager, Carol M. Taylor
  • Patent number: 5420639
    Abstract: Methods for compressing data in a system employing vector quantization (VQ) and Huffman coding comprise: First, quantizing an input vector by representing the input vector with a VQ codevector selected from a VQ codebook partitioned into subsets, wherein each subset comprises codevectors and each codevector is stored at a corresponding address in the VQ codebook. Next, generating a rate dependent Huffman codeword for the selected codevector, wherein the rate dependent Huffman codeword identifies the subset of the VQ codebook in which the selected codevector is stored. And finally, generating a substantially rate independent Huffman codeword for the selected codevector, wherein the substantially rate independent Huffman codeword identifies a particular VQ codevector within the subset identified by the rate dependent Huffman codeword.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: May 30, 1995
    Assignee: Scientific-Atlanta, Inc.
    Inventor: Michael G. Perkins
  • Patent number: 5376012
    Abstract: A power port terminal formed by stamping from a blank of conductive material comprises a contact receiving socket portion and an integral mounting portion. The socket includes a web with a plurality of beams thereon. Each of the beams has a curved surface with a bend therein. The inner surface of the beams on the bends thereof define a substantially continuous cylindrical contact surface at a predetermined point along the reference axis of the terminal. The contact surface has a predetermined constricted dimension measured in a plane perpendicular to the reference axis, this dimension being the most constricted dimension along the reference axis of the terminal. The terminal is thereby able to accommodate a pin of any desired axial length. The trailing mounting portion has a set of mounting legs thereon that, the preferred instance, extend generally perpendicular to the reference axis of the terminal. Latch tabs may be provided one or more of the beams.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: December 27, 1994
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Stephen L. Clark
  • Patent number: 5354666
    Abstract: EHS murine tumor cells express basement membrane proteins such as laminin, entactin, collagen and proteoglycan. An immortal mammalian cell line designated BAM having phenotypic characteristics of EHS murine tumor cells may be prepared by culture of EHS cells in nutrient culture medium supplemented with low concentration of mammalian serum. BAM cells express basement membrane proteins in vitro.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: October 11, 1994
    Assignee: Thomas Jefferson University
    Inventors: Keith G. Danielson, Renato V. Iozzo
  • Patent number: 5341425
    Abstract: In a data transmission system comprising a plurality N of transmission sites and at least one reception site, a set of data at each transmission site is uniquely encrypted by (a) providing each transmission site with a broadcast key unique to that transmission site and a system key that is the same for all transmission sites, the system key comprising a plurality S of bits and each of the broadcast keys comprising a unique plurality B of bits, wherein B is less than S; (b) convolving in a predetermined manner at each transmission site the system key and the broadcast key unique to that transmission site to generate a unique data encryption key for that transmission site; (c) encrypting the set of data at each transmission site with the unique data encryption key generated at that site. The sets of data uniquely encrypted at each transmission site are then transmitted to the reception site.
    Type: Grant
    Filed: December 2, 1992
    Date of Patent: August 23, 1994
    Assignee: Scientific Atlanta, Inc.
    Inventors: Anthony J. Wasilewski, Keith Gammie
  • Patent number: 5256078
    Abstract: A socket has a housing equipped with an elastic metal sheet between both ends thereof. The metal sheet is provided integral with a mount leg portion for mounting the housing on a mother board, a hook for engaging a corresponding engaging hole in a daughter board, and a leaf spring for elastically pushing up the daughter board in a manner to engage the hook. The daughter board inserted in a recess of the housing is pushed up by the leaf spring whereby the engagement of the daughter board and hook is ensured.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: October 26, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Nai H. Lwee, David J. Dutkowsky
  • Patent number: 5247934
    Abstract: Methods are provided for detecting and diagnosing osteoporosis using high-resolution NMR imaging of trabecular bone. One such method comprises the steps of obtaining high-resolution NMR imaging data indicative of the trabecular microstructure of a mass of bone, analyzing the imaging data to determine the density of the trabeculae of the bone, comparing the density thus obtained with reference trabecular density data, and determining on the basis of the comparison whether the subject is osteoporotic or normal. To determine trabecular density, bone volume can be computed as the area fraction of those pixels that by virtue of their characteristic pixel intensity can be assigned to bone. Trabecular thickness can be computed from the relative bone area in a region of interest divided by half the perimeter length, the perimeter length being the circumference of all bone islands observed in the region of interest.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: September 28, 1993
    Assignee: Trustees of the University of Pennsylvania
    Inventors: Felix W. Wehrli, Steven D. Kugelmass
  • Patent number: 5155638
    Abstract: A compatible disk drive is disclosed which is capable of writing and reading data on either of first, second and third interchangeable flexible magnetic disk cartridges of different storage capacities at first, second and third prescribed data transfer rates, respectively. The first and second disk cartridges have a first and a second capacity discriminate window, respectively, formed in different prescribed positions in their housings by way of contradistinction from each other and from the third disk cartridge which has no capacity discriminate window. The disk drive customarily employs two disk sensors for discriminating among the first, second and third disk cartridges. The invention ultilizes the binary outputs from the two disk sensors for the detection of the loading of any of the three types of disk cartridges, thereby dispensing with an additional sensor heretofore employed for that purpose.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: October 13, 1992
    Assignee: Teac Corporation
    Inventors: Shinichi Aikawa, Yoshiaki Sakai
  • Patent number: 4973980
    Abstract: An ink jet apparatus having a scanning head employing at least one ink jet with a variable volume chamber which includes an ink droplet ejecting orifice, and a transducer, having a length mode resonant frequency, adapted to expand and contract along an axis of elongation in response to an electric field substantially transverse to the axis of elongation for ejection of droplets on demand from the ink droplet ejecting orifice is acoustically microstreamed by exciting the transducers during non-printing periods to eliminate start-up problems and to maintain pigments or other particles in dispersion within the ink.
    Type: Grant
    Filed: March 30, 1989
    Date of Patent: November 27, 1990
    Assignee: Dataproducts Corporation
    Inventors: Stuart D. Howkins, John A. McCormick
  • Patent number: 4811132
    Abstract: An early end of tape sensing subsystem for a data processing system, including a host computer, a cache buffer, and a magnetic tape drive subsystem utilizes outputs dependent upon the movement of a capstan wheel, swing arm, and file reel of the magnetic tape drive subsystem, determining the net movement of tape therein in order to measure the circumference of the file reel plus tape thereon. Whenever a series of valid readings from a conventional sensor are obtained indicating that the circumference of the file reel plus tape is approaching that of the circumference of the file reel itself (i.e., no tape on the file reel), a signal is sent to the microprocessor controlling the cache buffer, said signal indicating that the end of the tape is approaching.
    Type: Grant
    Filed: September 26, 1986
    Date of Patent: March 7, 1989
    Inventors: Dan A. Hunter, Lawrence F. Opperman, George Gooras
  • Patent number: 4769818
    Abstract: A method of, and apparatus for, encoding and decoding a sequence of data bytes to permit correction of bit errors occurring in one byte of the sequence, or two bytes providing that the two incorrect bytes can be identified (for example if the bytes show parity failure). Each data byte of the sequence comprises data bits and one parity check bit. To encode the sequence of data bytes two "Code C" code bytes are determined from the data bytes, according to predetermined relationships, the data bytes and code bytes together forming an encoded data block. Also, there is provided a method of, and apparatus for, encoding and decoding a bundle of data blocks to permit correction of a number of bit errors occurring in bytes of the bundle. (Conceptually, the bundle of data blocks comprises a stack of data blocks, one positioned under another to form a two dimensional array of bytes.) Data block bundle encoding consists of separately encoding rows (i.e. horizontal encoding) and columns or pairs of columns (i.e.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: September 6, 1988
    Assignee: Canadian Patents and Development Limited-Societe Canadienne Des Brevets et d'Exploitation Limitee
    Inventor: Brian C. Mortimer
  • Patent number: 4758431
    Abstract: A novel system and method for treating ischemic neurologic tissue is disclosed wherein an oxygenated nutrient emulsion is circulated through at least a portion of the cerebospinal pathway. The nutrient emulsion contains an oxygenatable non-aqueous component, an aqueous nutrient component, an emulsification component, and other components which render physiologic acceptability of the nutrient emulsion. Methods for producing the nutrient emulsion and a system for delivering that emulsion to the cerebrospinal pathway are also disclosed. Additionally, novel diagnostic methods for diagonising the physiologic state of hypoxic-ischemic and other diseased neurologic tissue during treatment are provided.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 19, 1988
    Assignee: Thomas Jefferson University
    Inventor: Jewell L. Osterholm
  • Patent number: 4664849
    Abstract: Beta double prime alumina is provided having a sensible amount of at least one polyvalent cationic species intercalated therein. In accordance with a preferred embodiment, such beta double prime alumina is provided having trivalent and/or tetravalent cationic species intercalated therein, especially species derived from the lanthanide and actinide series of elements. Certain of the foregoing materials exhibit phosphorescence or fluorescence, and some are believed to be capable of producing laser emission upon suitable irradiation.Methods for modifying beta double prime aluminas comprising contacting crystals of the aluminas with polyvalent cation-containing salts such as in the molten state or in the gaseous state are also provided. Laser and other optical devies are disclosed employing the modified beta double prime aluminas of this invention.
    Type: Grant
    Filed: June 29, 1983
    Date of Patent: May 12, 1987
    Assignee: University Patents, Inc.
    Inventors: Gregory C. Farrington, Bruce S. Dunn
  • Patent number: 4646146
    Abstract: A surveillance device consists of a video camera, a shutterless objective, a transmission optic element with an automatically controlled cat's eye shutter, and reflecting mirrors, for projecting an intermediate image generated by the objective into the video camera. The objective can swivel about both axes of the image, while a deflecting mirror is coupled to the objective in such a way that the intermediate image is always located in the same place.
    Type: Grant
    Filed: January 3, 1985
    Date of Patent: February 24, 1987
    Assignee: Dedo Weigert Film GmbH
    Inventors: Frederick DeHubry, Gunter Knon
  • Patent number: 4473905
    Abstract: The present invention provides a completely self-contained intraoral larynx comprising a power source, tongue activated controls, power saving signal generation circuitry, acoustic and audio amplifiers, and an intra-oral speaker. These components are contained within an otherwise conventional denture or dental prosthesis. The device produces a high amplitude sound while minimizing current drain from the power source. Laryngectomized patients require only short term training by a speech pathologist to use this device. Intelligible speech is usual within an hour of such training, and facility rapidly improves. The psychological barriers, post-operative physical limitations, aesthetic concerns and limited gestural communication traditionally associated with the use of extra-oral larynges is eliminated by the present invention.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: September 25, 1984
    Assignee: Thomas Jefferson University
    Inventors: Philip Katz, Henry S. Brenman, Louis D. Lowry, Harold Schwartz