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USPTO Patent Rankings Data through Dec 31, 2025
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David E. Crots — 4 Patents

LGLibbey Glass: 4 patents #8 of 32Top 25%
Iron River, MI: #84 of 361 inventorsTop 25%
Michigan: #22,248 of 86,293 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
David E. Crots has been granted 4 US patents while listed as an inventor at Libbey Glass. The first was granted in 1998 and the most recent in July 2001. David E. Crots ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list David E. Crots in Iron River, MI, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6253579 Valve hamper assembly Terry E. Hartman, Herbert C. Kroh 2001-07-03 $4,551,000
6233975 Common cage assembly Terry E. Hartman, Herbert C. Kroh 2001-05-22 $3,656,000
6038889 Cooling system for a glassware machine Terry E. Hartman, Herbert C. Kroh 2000-03-21 $3,064,000
5851257 Apparatus and method for pressing of glass articles at a high cavity rate Herbert C. Kroh 1998-12-22 $3,108,000