Stanley H. Gratt — 2 Patents at Superior Graphite

Stanley H. Gratt has been granted 2 US patents while listed as an inventor at Superior Graphite. The first was granted in 1987 and the most recent in July 1993. Stanley H. Gratt ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Stanley H. Gratt in Chicago, IL, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5224266	Method of manufacturing a hydraulic pump cylinder	—	1993-07-06
4634545	Railroad track lubricant	Peter L. Zaleski	1987-01-06

Stanley H. Gratt — 2 Patents

Issued Patents All Time

Patent Widget