{"@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [{"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.patentleaderboard.com/"}, {"@type": "ListItem", "position": 2, "name": "Unknown", "item": "https://www.patentleaderboard.com/company/unknown"}, {"@type": "ListItem", "position": 3, "name": "Adolf Spengler", "item": "https://www.patentleaderboard.com/inventor/fl:ad_ln:spengler-1"}]}
Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
AS

Adolf Spengler — 2 Patents

UNUnknown: 1 patents #29,356 of 83,584Top 40%
Wertheim, DE: #34 of 116 inventorsTop 30%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Adolf Spengler has been granted 2 US patents while listed as an inventor at Unknown. The first was granted in 1980 and the most recent in May 1985. Adolf Spengler ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Adolf Spengler in Wertheim, DE.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4516859 Apparatus for closing a discharge opening in a rotary table Josef Hasenhundl 1985-05-14
4186592 Method of measuring the moisture content in flowable materials and apparatus for carrying out the method Hubert Eirich, Walter Eirich, Paul Eirich, Josef Hasenhundl 1980-02-05