This inventor holds 11 USPTO granted patents and 6 published patent applications and 6 EPO patents. Top assignees: Plasmon Data Systems, Acal Energy Limited, Dr. Johannes Heidenhain Gmbh. Active years: 1987-2019.
Location History:
- Coton, GB (1987 - 1992)
- Cambridge, GB (1987 - 1995)
- Cheshire, GB (2016)
- Runcorn, GB (2019)
Company Filing History:
5 out of 6 
1 out of 10 
1 out of 807 
Years Active: 1987-2019
Title: The Innovations of Robert J Longman
Introduction
Robert J Longman, a prominent inventor based in Coton, GB, has made significant contributions to the field of optical disk technology. With a total of 9 patents to his name, his work has greatly influenced the way data is recorded and retrieved on optical disks.
Latest Patents
Longman's latest patents revolve around enhancing optical disk recording performance. One of his inventions details a method for reducing the surface noise of optical disk products that feature a surface relief pattern. In one embodiment of this innovation, an adherent layer is applied to the disk's substrate prior to the coating process with the recording material. Another embodiment describes a polymeric replica produced from a master disk which is treated through spin coating or dipping in a weak solvent. This treatment smooths out microscopic roughness, thereby eliminating surface irregularities. Additionally, a third embodiment involves a metal-coated replica undergoing an electropolishing operation, which effectively removes a small amount of metal material, particularly from the 'high spots' on the surface.
Career Highlights
Throughout his career, Robert J Longman has been associated with notable companies in the industry, including Plasmon Data Systems and Plasmon Data Systems, P.V. His experience in these organizations has served to refine his expertise and innovative capacity, particularly in optical technologies.
Collaborations
Longman has collaborated with esteemed professionals such as Peter R Helfet and Robert M Pettigrew during his career. These partnerships have fostered an environment of shared knowledge and creativity, further enhancing the impact of his inventions.
Conclusion
Robert J Longman's contributions to the field of optical disk technology through his patents demonstrate his innovative spirit and dedication to advancing the capabilities of data storage. His inventions not only address current technical challenges but also lay the groundwork for future advancements in the industry.