Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DH

David A. Harper — 3 Patents

3M: 3 patents #4,239 of 11,543Top 40%
Windom, MN: #1,016 of 2,819 inventorsTop 40%
Minnesota: #19,251 of 52,454 inventorsTop 40%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
David A. Harper has been granted 3 US patents while listed as an inventor at 3M. The first was granted in 2014 and the most recent in December 2015. David A. Harper ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list David A. Harper in Windom, MN, US.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
9208704 Hybrid self illuminated and actively back lit signage for printed graphics Erik A. Aho, Audrey A. Sherman, Michael A. Meis, Kevin R. Schaffer, Patrick Thomas +3 more 2015-12-08 $23,878,000
9070312 Hybrid self illuminated and actively back lit signage for printed graphics Erik A. Aho, Audrey A. Sherman, Michael A. Meis, Kevin R. Schaffer, Patrick Thomas +3 more 2015-06-30 $18,884,000
8919969 On-product projection for digital merchandizing Rolf W. Biernath, Matthew Robbins, Ellyar Y. Barazesh 2014-12-30 $20,555,000