Company Filing History:
5 out of 24,196 
1 out of 832,891 Years Active: 1977-1980
Title: Martin O Halfhill: Innovator in Data Recording Technologies
Introduction
Martin O Halfhill is a notable inventor based in San Jose, CA. He holds a total of 6 patents that showcase his contributions to data recording technologies. His innovative methods have significantly impacted the way data is managed and recorded on disks.
Latest Patents
One of Halfhill's latest patents is a method and apparatus for recording data without recording on defective areas. This method involves transferring data between a data supply and a disk that has a track divided into sectors. Each sector contains an address recording area followed by a data recording area. The method includes detecting a defective area on the data recording area, writing the address of the defective area on the corresponding address recording area, and recording data on the data recording area by detecting the defective area with the address. The remaining data is then written on the data recording area succeeding the defective area. The apparatus includes circuits to record a test pattern on the disk, sense the recorded test pattern, write the address, write data, and read the recorded area.
Another significant patent involves the utilization of stored run-out information in a track following servo. This servo system includes a recording head that senses servo data on a disk track for fine positioning of the head. An external transducer generates signals representing the coarse position of the head. A micro-processor stores coarse position signals, which include information about repeatable errors such as disk wobble. The compensator maintains information concerning small offsets of the disk due to temperature variations. This innovative approach allows for precise control of the head's movement, ensuring accurate data retrieval.
Career Highlights
Throughout his career, Martin O Halfhill has worked with prominent companies, including Xerox Corporation. His experience in these organizations has contributed to his expertise in data recording technologies and innovation.
Collaborations
Halfhill has collaborated with notable individuals in the field, including James O Jacques and Stipe Cizmic. These collaborations have likely enriched his work and led to further advancements in his inventions.
Conclusion
Martin O Halfhill's contributions to data recording technologies through his patents and collaborations highlight his innovative spirit and dedication to advancing the field. His work continues to influence how data is managed and recorded, showcasing the importance of innovation in technology.