Patents by Inventor Christopher D. Hahm

Christopher D. Hahm 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: 7016150
    Abstract: An apparatus has an information storage medium with an information storage surface, and structure operable to effect relative movement of the head and surface within a first zone while maintaining the head adjacent the surface and while using the head to effect at least one of reading information from and writing information to the surface. A head cleaning section includes a cleaning part engageable with the head when the head is in a second zone where the head is spaced from the surface, the structure being operable to effect relative movement of the engaged head and cleaning part in a manner which includes a component of movement that is representative of an applied force subject to a damping influence.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: March 21, 2006
    Assignee: Iomega Corporation
    Inventors: Christopher D. Hahm, Marty L. Stout, Stephanie L. Seaman
  • Patent number: 6756791
    Abstract: The present invention includes capacitive film thickness measurement devices and measurement systems. The invention also includes machines or instruments using those aspects of the invention. The present invention additionally includes methods and procedures using those devices of the present invention. The present invention discloses a capacitance measurement device and technique useful in determining lubricant film thickness on substrates such as magnetic thin-film rigid disks. Using the present invention, variations in lubricant thickness on the Angstrom scale or less may be measured quickly and nondestructively.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: June 29, 2004
    Assignee: The Ohio State University
    Inventors: Bharat Bhushan, Christopher D. Hahm
  • Publication number: 20040090707
    Abstract: An apparatus has an information storage medium with an information storage surface, and structure operable to effect relative movement of the head and surface within a first zone while maintaining the head adjacent the surface and while using the head to effect at least one of reading information from and writing information to the surface. A head cleaning section includes a cleaning part engageable with the head when the head is in a second zone where the head is spaced from the surface, the structure being operable to effect relative movement of the engaged head and cleaning part in a manner which includes a component of movement that is representative of an applied force subject to a damping influence.
    Type: Application
    Filed: October 24, 2003
    Publication date: May 13, 2004
    Inventors: Christopher D. Hahm, Marty L. Stout, Stephanie L. Seaman
  • Publication number: 20040090706
    Abstract: A data storage apparatus (10) includes a drive (13) which can removably receive a cartridge (12) that contains a rotatable hard disk (17). The drive has a read/write head (38) supported for movement between a position adjacent an information storage surface (21) on the disk, and a position engaging a cleaning surface (52, 118) located within the drive. A vibrator (56, 112) effects vibration of the cleaning surface while it engages the head, in order to provide efficient and effective cleaning of an air bearing surface on the head, including shallow recesses of this surface.
    Type: Application
    Filed: November 12, 2002
    Publication date: May 13, 2004
    Inventors: Fred C. Thomas, Christopher D. Hahm
  • Patent number: 6724199
    Abstract: Capacitive film thickness measurement devices and measurement systems used in machines or instruments. A capacitance measurement device and technique useful in determining lubricant film thickness on substrates such as magnetic thin-film rigid disks. Variations in lubricant thickness on the Angstrom scale or less may be measured quickly and nondestructively.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: April 20, 2004
    Assignee: The Ohio University
    Inventors: Bharat Bhushan, Christopher D. Hahm
  • Patent number: 6717419
    Abstract: The present invention includes capacitive film thickness measurement devices and measurement systems. The invention also includes machines or instruments using those aspects of the invention. The present invention additionally includes methods and procedures using those devices of the present invention. The present invention discloses a capacitance measurement device and technique useful in determining lubricant film thickness on substrates such as magnetic thin-film rigid disks. Using the present invention, variations in lubricant thickness on the Angstrom scale or less may be measured quickly and nondestructively.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: April 6, 2004
    Assignee: The Ohio State University
    Inventors: Bharat Bhushan, Christopher D. Hahm
  • Patent number: 6504386
    Abstract: The present invention includes capacitive film thickness measurement devices and measurement systems used in machines or instruments. A capacitance measurement device and technique useful in determining lubricant film thickness on substrates such as magnetic thin-film rigid disks. Using the present invention, variations in lubricant thickness on the Angstrom scale or less may be measured quickly and nondestructively.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: January 7, 2003
    Assignee: The Ohio State University
    Inventors: Bharat Bhushan, Christopher D. Hahm
  • Publication number: 20020150035
    Abstract: An optical storage device that is characterized by an actuator assembly movably coupled within said optical information storage apparatus. A narrow buried heterojunction semiconductor laser is coupled to a distal end of the arm so that the arm moves the narrow buried heterojunction semiconductor laser into a near field relationship with an optical medium. A motor spins the optical medium at an operational speed.
    Type: Application
    Filed: April 17, 2001
    Publication date: October 17, 2002
    Applicant: Iomega Corporation
    Inventors: Bruce E. Bernacki, Kristin A.M. Scott, Christopher D. Hahm, Paul R. Johnson
  • Patent number: 6459280
    Abstract: The present invention includes capacitive film thickness measurement devices and measurement systems. The invention also includes machines or instruments using those aspects of the invention. The present invention additionally includes methods and procedures using those devices of the present invention. The present invention discloses a capacitance measurement device and technique useful in determining lubricant film thickness on substrates such as magnetic thin-film rigid disks. Also disclosed is a device and technique for determining film thickness by suspending the film in a liquid dielectric. Using the present invention, variations in lubricant thickness on the Angstrom scale or less may be measured quickly and nondestructively.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: October 1, 2002
    Assignee: The Ohio State University
    Inventors: Bharat Bhushan, Christopher D. Hahm