Inventor · Penn Hills, PA, US

Robert A. Marra

4Patents
4h-index
12Co-inventors
43Inventor score

Filing activity: Jun 10, 1985 → Sep 12, 1991

Most-cited inventions

PatentTitleAreaCited byStatus
US5371050A Aluminum phosphate bonded fiber reinforced composite material containing metal coated fibers Emerging Cross-Sectional Technologies 25 Expired
US6309994A Fiber reinforced composite having an aluminum phosphate bonded matrix Emerging Cross-Sectional Technologies 20 Expired
US4678657A Production of high purity substantially spherical metal hydroxide/oxide particles from the hydrolysis of a metal alkoxide aerosol using metal hydroxide/oxide seed nuclei Chemistry; Metallurgy 12 Expired
US5194202A Formation of ceramic-metal composite by pressure casting and oxidation sintering Mechanical Engineering; Lighting; Heating 6 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.