Patents by Inventor Ramesh Sundram

Ramesh Sundram 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).

  • Multi-impact thermal asperity sensor head
    Patent number: 5825181
    Abstract: An asperity height sensing head and method of using the same are disclosed. The head includes multiple magnetoresistive (MR) sensors carried by a first rail of a slider adjacent to the air bearing surface (ABS) and positioned a distance L.sub.p from each other. Asperity height estimating circuitry coupled to each of the multiple MR sensors detects a number N of the MR sensors which exhibit a change in resistance as a result of contact between the ABS and a first asperity on the surface of the disc. The asperity height estimating circuitry estimates the height H.sub.A of the first asperity as a function of the number N, as a function of the pitch angle .theta..sub.p , and as a function of the distance L.sub.p.
    Type: Grant
    Filed: April 1, 1997
    Date of Patent: October 20, 1998
    Assignee: Seagate Technology, Inc.
    Inventors: Mark J. Schaenzer, Zine-Eddine Boutaghou, Subrahmanyan Nagarajan, Ramesh Sundram