{"@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [{"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.patentleaderboard.com/"}, {"@type": "ListItem", "position": 2, "name": "Amtrol", "item": "https://www.patentleaderboard.com/company/amtrol"}, {"@type": "ListItem", "position": 3, "name": "Robert Hull", "item": "https://www.patentleaderboard.com/inventor/fl:ro_ln:hull-11"}]}
Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
RH

Robert Hull — 3 Patents

AMAmtrol: 2 patents #12 of 37Top 35%
East Greenwich, RI: #194 of 687 inventorsTop 30%
Rhode Island: #1,879 of 6,211 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Robert Hull has been granted 3 US patents while listed as an inventor at Amtrol. The first was granted in 1984 and the most recent in June 1992. Robert Hull ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Robert Hull in East Greenwich, RI, US.

Patents per Year

Patents granted per year, 1984 to 1992Bar chart with a peak of 1 patents in 1984.peak 11984: 1 patents19841985: 1 patents19851992: 1 patents1992

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5117558 Hand-held rotary barbecue rotisserie 1992-06-02
4555253 Gas-liquid vortex separator-eliminator Joseph A. Lane 1985-11-26
4475932 Gas-liquid vortex separator-eliminator Joseph A. Lane 1984-10-09