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Roger P. Day — 3 Patents

UNUnknown: 1 patents #29,356 of 83,584Top 40%
Kemah, TX: #27 of 69 inventorsTop 40%
Texas: #41,402 of 125,132 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Roger P. Day has been granted 3 US patents while listed as an inventor at Unknown. The first was granted in 1989 and the most recent in May 2001. Roger P. Day ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Roger P. Day in Kemah, TX, US.

Patents per Year

Patents granted per year, 1989 to 2001Bar chart with a peak of 1 patents in 1989.peak 11989: 1 patents19891993: 1 patents19932001: 1 patents2001

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6237523 Stair device John Nixon 2001-05-29
5233159 Direct current welding system — 1993-08-03
4823910 Boat platform ladder — 1989-04-25

Frequent Collaborators

John Nixon1 shared

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