This inventor holds 5 USPTO granted patents and 1 published patent application. Top assignees: Priam, International Business Machines Corporation, Priam (Delaware) Corporation. Active years: 1986-1996.
Company Filing History:
2 out of 21 
1 out of 166,325 
1 out of 2 
Years Active: 1986-1996
Title: Joseph T. Castagna: Innovator in Vibration Sensing Technology
Introduction
Joseph T. Castagna is a notable inventor based in San Jose, CA (US). He has made significant contributions to the field of vibration sensing technology, holding a total of 5 patents. His work has been instrumental in enhancing the performance of disk drives and information storage systems.
Latest Patents
One of his latest patents is the "Flex Circuit Vibration Sensor." This invention provides a method and apparatus for sensing vibration in a flex circuit located between a rotary actuator and electronics within a disk drive. The apparatus includes a strain gauge that is either attached to or embedded within the flex circuit. The resistivity of the strain gauge varies in response to vibrations on the cable. This resistance variation can be transformed into electrical signals that are utilized by a servo system to move the actuator assembly in compensatory motion, effectively canceling any off-track motion caused by the vibrations.
Another significant patent is the "Head Arm Damping Device for Disc Drive Actuators." In this invention, a damping device is provided for reducing vibrations within the head arms of an information storage system that has multiple data storage media. The damping device is constructed from a compressible viscoelastic material with a relatively high loss factor, which helps to mitigate vibrations.
Career Highlights
Throughout his career, Joseph T. Castagna has worked with prominent companies such as Priam and Quantum Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in the field of data storage technology.
Collaborations
Joseph has collaborated with notable individuals in the industry, including Michael R. Hatch and Chee K. Han. These collaborations have contributed to the advancement of his inventions and the overall progress in vibration sensing technology.
Conclusion
Joseph T. Castagna is a distinguished inventor whose work in vibration sensing technology has made a lasting impact on the industry. His innovative patents and collaborations reflect his commitment to advancing technology in data storage systems.