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Robert B. Porter — 4 Patents

NTNumat Technologies: 2 patents #9 of 20Top 45%
ABAcuity Brands: 1 patents #124 of 148Top 85%
Elburn, IL: #29 of 121 inventorsTop 25%
Illinois: #21,640 of 84,256 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Robert B. Porter has been granted 4 US patents while listed as an inventor at Numat Technologies. The first was granted in 1986 and the most recent in December 1993. Robert B. Porter ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Robert B. Porter in Elburn, IL, US.

Patents per Year

Patents granted per year, 1986 to 1993Bar chart with a peak of 2 patents in 1993.peak 21986: 1 patents19861992: 1 patents19921993: 2 patents1993

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5272448 Method and apparatus to perform digital demodulation by measuring periods between zero crossings Mark D. Hedstrom, Charles R. Crego 1993-12-21
5239273 Digital demodualtor using signal processor to evaluate period measurements Mark D. Hedstrom, Charles R. Crego 1993-08-24
5159281 Digital demodulator using numerical processor to evaluate period measurements Mark D. Hedstrom, Charles R. Crego 1992-10-27
4576414 Seat belt apparatus John Molnar 1986-03-18 $9,918,000

Frequent Collaborators

Charles R. Crego3 shared
Mark D. Hedstrom3 shared
John Molnar1 shared

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