This inventor holds 4 USPTO granted patents. Top assignees: Western Digital Technologies, Inc., International Business Machines Corporation. Active years: 2000-2003.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
3 out of 5,429 
1 out of 166,351 
Years Active: 2000-2003
Title: Grant S Christiansen: Innovator in Disk Drive Technology
Introduction
Grant S Christiansen is a notable inventor based in Rochester, MN (US). He has made significant contributions to the field of disk drive technology, holding a total of 4 patents. His innovative work focuses on enhancing data detection and improving the performance of disk drives.
Latest Patents
Among his latest patents, one invention is a disk drive that discerns the polarity of a head signal from a sync mark to enhance data detection. This invention comprises a disk with multiple data tracks, each containing several sectors. A sync mark detector identifies a sync mark pattern in a sector, generating a sync mark detect signal and a polarity signal. The polarity signal represents the expected polarity of pulses in a read signal, which enhances the detection of an estimated data sequence from the read signal.
Another significant patent involves a disk drive employing a sync mark detector that includes a matched filter and a dual polarity correlator. This invention also consists of a disk with multiple data tracks and sectors. The sync mark detector filters a read signal using a matched filter, which has an impulse response closely matched to a dibit response of the disk drive. The output from the matched filter is then correlated with a dual polarity correlator to produce first and second correlated signals. The sync mark pattern is detected when either of these signals exceeds a predetermined threshold.
Career Highlights
Throughout his career, Grant has worked with prominent companies in the technology sector, including Western Digital Technologies, Inc. and IBM. His experience in these organizations has allowed him to develop and refine his innovative ideas in disk drive technology.
Collaborations
Grant has collaborated with several talented individuals in his field, including Mark David Hagen and Donald Earl Vosberg. These collaborations have contributed to the advancement of his inventions and the overall progress in disk drive technology.
Conclusion
Grant S Christiansen is a distinguished inventor whose work in disk drive technology has led to multiple patents and significant advancements in data detection. His contributions continue to influence the industry and inspire future innovations.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile