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USPTO Patent Rankings Data through Sept 30, 2025
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Michael D. Bethel — 2 Patents

WAWavephore: 2 patents #6 of 13Top 50%
Scottsdale, AZ: #1,390 of 3,386 inventorsTop 45%
Arizona: #13,050 of 32,909 inventorsTop 40%
Overall (All Time): #2,289,800 of 4,157,543Top 60%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5457714 Software controlled adaptive delta modulator Melvyn Engel, Michael J. Smith, Michael A. Sowell 1995-10-10
5208595 Digitally controlled adaptive slew rate delta modulator Melvyn Engel, Michael A. Sowell 1993-05-04