Robert L. Johnstone — 2 Patents at Worldspace

Robert L. Johnstone has been granted 2 US patents while listed as an inventor at Worldspace. The first was granted in 1999 and the most recent in June 2003. Robert L. Johnstone ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Robert L. Johnstone in West Boothbay Harbor, ME, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
D475338	Motor boat	Douglas A. Zurn	2003-06-03
5898680	System for providing location-specific data to a user	S. Joseph Campanella	1999-04-27

Robert L. Johnstone — 2 Patents

Issued Patents All Time

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