This inventor holds 6 USPTO granted patents. Top assignees: Spectradisc Corporation, Quixote Corporation, Ouixote Corporation. Active years: 1987-2002.
Company Filing History:
3 out of 5 
2 out of 7 
1 out of 1 Years Active: 1987-2002
Title: The Innovations of Philip E Rollhaus
Introduction
Philip E Rollhaus is a notable inventor based in Chicago, IL (US). He has made significant contributions to the field of optical disc technology, holding a total of 6 patents. His work has paved the way for advancements in how information is encoded and accessed on optical media.
Latest Patents
One of his latest patents is for a machine-readable optical disc with a reading-inhibit agent. This innovative optical disc features machine-readable, information-encoding capabilities, secured by a barrier layer. The barrier layer is designed to prevent machine-reading of the features. A reading-inhibit agent is included in the disc and is activated by the removal of the barrier layer. Once activated, this agent alters the disc to inhibit reading. Alternatively, the barrier layer can be removed, allowing the reading-inhibit agent to be activated by initial reading of the disc, such as exposure to optical radiation or rotation of the disc.
Career Highlights
Throughout his career, Philip E Rollhaus has worked with several companies, including Spectradisc Corporation and Quixote Corporation. His experience in these organizations has contributed to his expertise in optical disc technology and innovation.
Collaborations
Philip has collaborated with notable individuals in his field, including John R Powell and Irwin C Winkler. These collaborations have likely enriched his work and led to further advancements in his inventions.
Conclusion
Philip E Rollhaus is a distinguished inventor whose contributions to optical disc technology have had a lasting impact. His innovative patents and collaborations reflect his commitment to advancing the field.