Robert Longman — 11 Patents at Plasmon Data Systems

Robert Longman has been granted 11 US patents while listed as an inventor at Plasmon Data Systems. The first was granted in 1987 and the most recent in December 2019. Robert Longman ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list Robert Longman in Grafton, GB.

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #	Title	Co-Inventors	Date
10518228	Device and method for generating bubbles, use of the device and a fuel cell comprising the device	David Ward	2019-12-31
9385391	Fuel cells	Brian Clarkson	2016-07-05
5406540	Optical disk recording performance	Peter R. Helfet, Quentin J. Lister, Mark J. Broadbent	1995-04-11
5137617	Optical disk manufacture	Peter R. Helfet, Jitka Brynjolffssen	1992-08-11
5008687	Data storage medium	Peter R. Helfet, Michael John Abrams	1991-04-16
4928132	Optical data storage medium	Robert M. Pettigrew, Victor C. Humberstone, Keith Gardner, Peter R. Helfet	1990-05-22
4866696	Pre-formatted moth-eye type optical data storage member and method	Peter R. Helfet, Philip A. Storey	1989-09-12
4802736	Interferometers	Keith Gardner, Robert M. Pettigrew, Walter T. Welford	1989-02-07
4724444	Data storage medium	Robert M. Pettigrew, Victor C. Humberstone, Keith Gardner, Peter R. Helfet	1988-02-09
4703469	Optical data recording using radiation of different characteristics	Robert M. Pettigrew, Keith Gardner	1987-10-27
4657780	Manufacture of diffraction gratings	Robert M. Pettigrew	1987-04-14

Robert Longman — 11 Patents

Issued Patents All Time

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