Inventor
HARPER DAVID A
GB4 patents
⚠️ This page may combine multiple inventors who share the name “HARPER DAVID A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
3M INNOVATIVE PROPERTIES CO
3 patentsUS9070312B2Jun 30, 2015
Hybrid self illuminated and actively back lit signage for printed graphics
3M INNOVATIVE PROPERTIES CO2 citations60
US9208704B2Dec 8, 2015
Hybrid self illuminated and actively back lit signage for printed graphics
3M INNOVATIVE PROPERTIES CO0 citations50
US8919969B2Dec 30, 2014
On-product projection for digital merchandizing
3M INNOVATIVE PROPERTIES CO1 citations43