{"@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [{"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.patentleaderboard.com/"}, {"@type": "ListItem", "position": 2, "name": "AT&T", "item": "https://www.patentleaderboard.com/company/att"}, {"@type": "ListItem", "position": 3, "name": "William Hagerman", "item": "https://www.patentleaderboard.com/inventor/fl:wi_ln:hagerman-1"}]}
Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
WH

William Hagerman — 4 Patents

ATAT&T: 4 patents #4,409 of 18,772Top 25%
Naperville, IL: #874 of 3,051 inventorsTop 30%
Illinois: #21,640 of 84,256 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
William Hagerman has been granted 4 US patents while listed as an inventor at AT&T. The first was granted in 1993 and the most recent in June 2004. William Hagerman ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list William Hagerman in Naperville, IL, US.

Patents per Year

Patents granted per year, 1993 to 2004Bar chart with a peak of 1 patents in 1993.peak 11993: 1 patents19931995: 1 patents19951996: 1 patents19962004: 1 patents2004

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6752551 Vertically expandable keyboard 2004-06-22 $16,857,000
5500889 Method and apparatus for prioritizing a telephone call according to a level of service of an originator Mark Baker, Jack R. Penrod, Nancy Stevens 1996-03-19
5404350 Routing calls destined for inaccessible destinations Nicholas DeVito, Ted Moulos 1995-04-04
5222128 Telecommunication disaster plan Garry R. Daly, Sankara R. Polepalle, Earle H. West, III 1993-06-22