Patents by Inventor David T. Schaaf

David T. Schaaf 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: 9927245
    Abstract: A map scrolling method and apparatus for a navigation system prevents from displaying certain icons while displaying other icons based on conditions and settings of the navigation system during a transition period of a map scrolling operation. The map scrolling method includes the steps of: detecting activation of a map scrolling operation; checking whether there is any limit condition attached to icons as to remove them from a map image; scrolling the map image while removing the icons to which the limit condition is attached from the map image during a transition period of the map scrolling operation; and displaying all of the icons when the map scrolling operation is completed.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: March 27, 2018
    Assignee: Alpine Electronics, Inc.
    Inventors: David T. Schaaf, Andrew S. de Silva
  • Publication number: 20150292889
    Abstract: A map scrolling method and apparatus for a navigation system prevents from displaying certain icons while displaying other icons based on conditions and settings of the navigation system during a transition period of a map scrolling operation. The map scrolling method includes the steps of: detecting activation of a map scrolling operation; checking whether there is any limit condition attached to icons as to remove them from a map image; scrolling the map image while removing the icons to which the limit condition is attached from the map image during a transition period of the map scrolling operation; and displaying all of the icons when the map scrolling operation is completed.
    Type: Application
    Filed: June 9, 2015
    Publication date: October 15, 2015
    Inventors: David T. Schaaf, Andrew S. de Silva
  • Patent number: 9116004
    Abstract: A map scrolling method and apparatus for a navigation system prevents from displaying certain icons while displaying other icons based on conditions and settings of the navigation system during a transition period of a map scrolling operation. The map scrolling method includes the steps of: detecting activation of a map scrolling operation; checking whether there is any limit condition attached to icons as to remove them from a map image; scrolling the map image while removing the icons to which the limit condition is attached from the map image during a transition period of the map scrolling operation; and displaying all of the icons when the map scrolling operation is completed.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: August 25, 2015
    Assignee: Alpine Electronics, Inc.
    Inventors: David T. Schaaf, Andrew S. de Silva
  • Patent number: 6112153
    Abstract: A navigation system user interface identifies and displays a list of all addresses which contain address components in conformity with the user provided "city name", "street base name" and "house number" and prompts the user to choose an address from the list thus provided. Alternatively, the interface generates a list of all the city names which contain valid addresses in conformity with the user provided "street base name" and "house number". The system, subsequently, displays a list of all possible addresses with components matching those entered/selected by the user and prompts the user to select an address from the list thus provided.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: August 29, 2000
    Assignee: Alpine Electronics, Inc.
    Inventors: David T. Schaaf, Kerry M. White, Ji-Bih Lee
  • Patent number: 6035299
    Abstract: A four-byte data structure for representing alphanumeric or numeric house numbers (addresses) for use in a mapping system. The data structure has the same field size as that used for representing house numbers with numeric characters. One bit of the data structure is used to determine the presence of a non-numeric character in the house number. If the bit stream defined by bit positions 30-28 is either "000" or "100" or 101" or "110" or "111", then fourteen bits represent the numeric portion preceding the alphabetic character, ten bits represent the numeric portion succeeding the alphabetic character, two bits represent leading zeroes preceding any alphabetic and numeric characters and two bits represent leading zeroes disposed after an alphabetic character and before a numeric character succeeding the alphabetic character.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: March 7, 2000
    Assignee: Alpine Electronics, Inc.
    Inventors: Kerry M. White, David T. Schaaf