Company Filing History:
2 out of 164,197 
1 out of 2,636 
Years Active: 2002-2005
Title: John Patrick Hagen: Innovator in Data Storage Technologies
Introduction
John Patrick Hagen is a notable inventor based in Rochester, MN (US). He has made significant contributions to the field of data storage technologies, holding a total of 3 patents. His innovative work has advanced the efficiency and quality of data storage devices.
Latest Patents
One of Hagen's latest patents is the "Lapping Plate Topography System." This system includes a measuring apparatus designed to assess the surface of a lapping plate. It features a non-contacting capacitive probe for measuring height, a rotary arm assembly for moving the probe, and a spindle assembly for rotating the lapping plate. The computer-based analysis apparatus processes the measured data, calculating Fourier transform harmonic coefficients and surface ripple coefficients for display.
Another significant patent is the "Apparatus and Method for Reclaiming a Disk Substrate for Use in a Data Storage Device." This invention provides a cost-effective and high-quality method for reclaiming disk substrates. The process involves stripping a layer from a data storage disk and polishing it with controlled relative velocity between polishing pads. This method enhances stock removal uniformity and ensures that the polished disks meet specific thickness requirements for storage devices.
Career Highlights
Hagen has worked with prominent companies in the technology sector, including IBM and Hitachi Global Storage Technologies Netherlands B.V. His experience in these organizations has contributed to his expertise in data storage innovations.
Collaborations
Throughout his career, Hagen has collaborated with notable individuals such as Dennis Leonard Fox and James Aloysius Hagan. These collaborations have likely enriched his work and led to further advancements in his field.
Conclusion
John Patrick Hagen's contributions to data storage technology through his patents and career experiences highlight his role as an innovator in the industry. His work continues to influence the development of efficient data storage solutions.