Patents Represented by Attorney, Agent or Law Firm Rama B Nath
  • Patent number: 7493194
    Abstract: A method/system for achieving force control in externally driven hydraulic/gas-filled cylinders estimates effective flow parameters based on sensor measurements, and predicts desired flow parameters for force control objectives and determines required control actuation signals. The system selectively uses pressure sensors to measure the pressure of fluid in each (hydraulic) cylinder, displacement sensors to measure the displacement of the piston in each (hydraulic) cylinder, piston velocity sensors or piston velocity estimators, manifold pressure sensors or manifold pressure estimators, converters that digitize analog signals from the sensors, a microprocessor capable of storing data from the converters and producing actuator signals, and flow regulating actuators responsive to the actuator signals for regulating the flow of (hydraulic) fluid out of each cylinder by changing the effective flow-area of flow ports.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: February 17, 2009
    Inventor: Ravinder Venugopal
  • Patent number: 6617354
    Abstract: A method of stabilizing and potentiating action of molecules of known anti-angiogenic substances such as Angiostatin® or Endostatin® by using in coupling conjugation with cis-unsaturated fatty acids (c-UFAs) in the treatment of cell proliferative disorders uses c-UFAs chosen from linoleic acid, gamma-linolenic acid, dihomo-gamma-linolenic acid, arachidonic acid, alpha-linolenic acid, eicosapentaenoic acid, docosahexaenoic acid and cis-parinaric acid in predetermined quantities. Preferably, the c-UFAs are in the form of polyunsaturated fatty acids (PUFAs). Uncontrolled or undesirable angiogenic activity promotes cell proliferative disorders and tumor growth, which can be inhibited by the selective use of PUFAs with anti-angiogenic substances used selectively in conjunction with predetermined anti-cancer drugs. For a non-glioma type of cell proliferation disorder, a sodium, potassium or lithium salt of a PUFA is preferred to form an admixture with an anti-angiogenic substance.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: September 9, 2003
    Inventor: Undurti Narasimha Das
  • Patent number: 6380253
    Abstract: A method of stabilizing and potentiating action of molecules of known anti-angiogenic substances such as Angiostatin® or Endostatin® by using in coupling conjugation with cis-unsaturated fatty acids (c-UFAs) in the treatment of cell proliferative disorders uses c-UFAs chosen from linoleic acid, gamma-linolenic acid, dihomo-gamma-linolenic acid, arachidonic acid, alpha-linolenic acid, eicosapentaenoic acid, docosahexaenoic acid and cis-parinaric acid in predetermined quantities. Preferably, the c-UFAs are in the form of polyunsaturated fatty acids (PUFAs). Uncontrolled or undesirable angiogenic activity promotes cell proliferative disorders and tumor growth, which can be inhibited by the selective use of PUFAs with anti-angiogenic substances used selectively in conjunction with predetermined anti-cancer drugs. For treatment of glioma, a sodium salt of a PUFA is preferred to form an admixture with an anti-angiogenic substance and a selected anti-cancer drug.
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: April 30, 2002
    Assignee: EFA Sciences LLC
    Inventor: Undurti Narasimha Das
  • Patent number: 5777618
    Abstract: A system and method for rapid panning of graphics images stored as objects in an object records database. The system comprises a computer with memory or memories divided into a several memory regions. The computer is coupled to a monitor for displaying graphics files stored in the database. The memory regions include: a virtual map (VMAP) region including cell maps comprising pointers to linked lists of objects in the database; a backing store region storing a bitmapped image of an entire file, and having the same effective dimensions as the VMAP; a main store region storing a smaller portion of the bitmapped image, the main store region having the same pixel dimensions as a viewing region on the monitor and a movable main store viewing window which permits a view of the subset of the bitmap.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: July 7, 1998
    Assignee: Digital Equipment Corporation
    Inventors: Ronald Allen Kita, Kaare Hedeman Klevjer, Ramesh Hero Vaswani
  • Patent number: 5649203
    Abstract: A program is translated by automatically generating a flowgraph, using the flowgraph to analyze the program to provide information about blocks of instructions in the flowgraph, and then using the flowgraph and the information about the blocks of instructions to generate translated instructions. Due to execution transfers to computed destination addresses that are not determined prior to program execution, it is not possible to include all of the program instructions in the flowgraph. Execution transfers to these computed destinations are coded as calls to an interpreter that interprets the untranslated code. Returns are made from the interpreter to block entry points that are the first instructions in the blocks. Moreover, information about the location of untranslated instructions in an original program is discovered during execution of a partial translation of the program, and that information is used later during retranslation of the original program.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: July 15, 1997
    Assignee: Digital Equipment Corporation
    Inventor: Richard Lee Sites
  • Patent number: 5456404
    Abstract: A method for testing semiconductor chips using a test package having electrical contacts which have in them metallized particles which pierce the surface of the pads of a semiconductor chip, the chips being mounted on a flexible substrate which can deflect to increase the uniformity of the level to which the metallized particles pierce the surface of the pads of the semiconductor chip. If the chip tests as "good", pressure can be applied to increase the piercing depth, thereby allowing the test package to be used as a permanent package.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: October 10, 1995
    Assignee: Digital Equipment Corporation
    Inventors: William C. Robinette, Jr., Chung W. Ho
  • Patent number: 5410545
    Abstract: A memory controller having a non-volatile memory is disclosed herein. The memory controller forms part of a computer system that includes a program for accessing the non-volatile memory. When memory errors are detected, data correlative to the detected memory errors, such as error syndromes, is stored in the non-volatile memory. Preferably, during each operating session, the area of the non-volatile memory designated for this type of storage is copied into volatile memory. The volatile memory is updated during the operating session and then copied back to the non-volatile memory when the operating session is terminated. Technicians may access the non-volatile memory to study the error history for diagnostic or design purposes.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: April 25, 1995
    Assignee: Digital Equipment Corporation
    Inventors: Brian Porter, Russell L. Myers
  • Patent number: 5377354
    Abstract: A method and apparatus for prioritizing a plurality of incoming electronic mail messages for a user uses a user created and modified rules-control (12) which is stored in a rules-store (12). Incoming messages are stored in a message store (11) and are screened individually by a rules test unit (13). The rules-test unit has a comparator (52) which matches keywords which are chosen by the user while creating the rules, add supplies signals to an action list unit (54). By applying the user created rules for deciding which messages constitute the priority messages for the user, a priority assigning unit (45) within an action portion (35B) of the rules-store (12) assigns a priority number (say from 1 to 5, 1 being the highest priority for example) to each screened message. Responsive to the assigned priority number of the screened message, the message is sent to a main folder store or forwarded or put away as appropriate. The user created rules can be modified by the user using a conventional keyboard.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: December 27, 1994
    Assignee: Digital Equipment Corporation
    Inventors: Niamh C. Scannell, Stuart D. Dawson, Anthony J. Redmond, Serge Himbaut, Pascale Bares, Alison Clark
  • Patent number: 5357427
    Abstract: Method and system for remote monitoring of high-risk patients using artificial intelligence. A plurality of high-risk patients can be simultaneously monitored without patient intervention. A patient hears questions in the doctor's voice at each monitoring encounter and responds. The patient's responses are recorded at a remote central monitoring station and can be analyzed on line or later. Artificial intelligence (AI) and voice technology (DECvoice) are combined to present to the patient, during a monitoring session or encounter, questions which would be selected from a plurality of different recorded questions. Questions to the patient are chosen using AI, based on the patient's response, by parsing. The monitor could take several forms such as for e.g., uterine activity strips, glucometers, blood pressure cuffs, pulse monitors, electroencephalographs, etc. Preferably, four telephone lines are dedicated to each patient, one for the monitor, one for the voice, one as a back up and one to sense failures.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: October 18, 1994
    Assignee: Digital Equipment Corporation
    Inventors: Pauline A. Langen, Jeffrey S. Katz, Gayle Dempsey, James Pompano