Patents by Inventor Walter Ludwig

Walter Ludwig has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6385266
    Abstract: A low-noise sampling PLL for high-resolution radar systems wherein the reference frequencies are taken from a line spectrum (SPK), which has been generated from the mixture of a low quartz oscillator frequency (F1) with a high quartz oscillator frequency (F2), with the quartz oscillator frequencies (F1, F2) being synchronized. The invention is employed in connection with sampling PLLs for high-resolution radar systems with a controllable frequency oscillator, whose output signal is partially coupled out into a feedback branch and compared with reference frequencies in a phase comparator.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: May 7, 2002
    Assignee: EADS Deutschland GmbH
    Inventors: Babette Häberle, Walter Ludwig, Harald Schuster
  • Patent number: 4521567
    Abstract: A method for making impact resistant molding compositions wherein a hard phase having a glass transition temperature above 25.degree. C. and consisting principally of methyl methacrylate is polymerized at least partially in a first stage, following which the monomers of a rubbery phase whose polymers have a glass transition temperature below 25.degree. C. are added in a second stage and the polymerization is carried to completion, polymerization of the hard phase in the first stage being performed in a presence of an oil soluble free radical initiator and of an organosulfur chain transfer agent having at least two thiol groups in the molecule, and polymerization of the monomers of the rubbery phase in the second stage being carried out with graft crosslinkers in the presence of the previously formed hard phase.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: June 4, 1985
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Walter Ludwig, Manfred Munzer, Werner Siol, Franz Wenzel
  • Patent number: 4463032
    Abstract: What are disclosed are a method for making non-blocking soft polymer beads by applying an adherent polymer deposit on the beads, said deposited polymer having a glass transition temperature at least 10.degree. C. higher than the glass transition temperature of the soft polymer beads, which latter temperature is below 70.degree. C., and non-blocking soft polymer beads made by this method.
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: July 31, 1984
    Assignee: Rohm GmbH
    Inventors: Peter J. Arndt, Werner Siol, Walter Ludwig, Franz Wenzel
  • Patent number: 4326353
    Abstract: A hand firearm, such as an automatic pistol, has a butt or handle in which a magazine is mounted. The magazine is retained in position by a locking member which can be actuated from either side of the pistol by the hand of the user holding the firearm. The locking member is a spring-loaded lever which has a projection received in an opening in the wall of the magazine to lock the magazine in position. An actuating member extends on both sides of the firearm and is operatively connected with the locking lever so that actuation of the actuating element will pivot the lever to unlock the magazine.
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: April 27, 1982
    Assignee: Carl Walther GmbH
    Inventors: Walter Ludwig, Franziska Schmid, deceased
  • Patent number: 4313274
    Abstract: A hand firearm has an axially movable firing pin which can be secured against axial displacement and a pivotable hammer which is retained in its cocked position by a safety lever. Upon actuation of the trigger a trigger arm first engages a release lever to disengage the firing pin from axial securement and subsequently engages the safety lever to release the safety lever from the hammer so that the hammer under the action of a spring moves from its cocked position to the firing position. The free end of the trigger arm is provided with longitudinally and laterally mutually offset abutments which sequentially engage the release lever and then the safety lever.
    Type: Grant
    Filed: December 11, 1979
    Date of Patent: February 2, 1982
    Assignee: Carl Walther GmbH
    Inventors: Walter Ludwig, Franziska Schmid, deceased
  • Patent number: 3940104
    Abstract: A die-cast peripheral housing for the rotor of rotary combustion engines, having cast-in passages for liquid cooling, the passages providing optimum wall thickness and coolant flow at the region of high heat input.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: February 24, 1976
    Assignee: Curtiss-Wright Corporation
    Inventors: Walter Ludwig Hermes, Murray Berkowitz, Charles Lombaerde
  • Patent number: D395483
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: June 23, 1998
    Assignee: Riteflite Pty Limited
    Inventor: Walter Ludwig Maryska
  • Patent number: PP25648
    Abstract: A new and distinct cultivar of Heuchera plant named ‘Inheuredfu’, characterized by its compact and uniformly mounded plant habit; vigorous growth habit; densely foliated and bushy appearance; ruffled dark burgundy-colored leaves that become dark brown with development; and excellent garden performance.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: June 23, 2015
    Assignee: Innovaplant Zierpflanzen GmbH & Co KG
    Inventor: Walter Ludwig
  • Patent number: PP27568
    Abstract: A new and distinct cultivar of Heuchera plant named ‘Inheubrara’, characterized by its compact and uniformly mounded plant habit; vigorous growth habit; densely foliated and bushy appearance; very dark-colored leaves; numerous red purple-colored flower buds and flowers held above the foliar plane on dark purple-colored peduncles; and excellent garden performance.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: January 17, 2017
    Assignee: Innovaplant Zierpflanzen GmbH & Co., KG
    Inventor: Walter Ludwig