P

Inventor

HOFELDT DAVID L

US11 patents
⚠️ This page may combine multiple inventors who share the name “HOFELDT DAVID L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

3M INNOVATIVE PROPERTIES CO

6 patents
US7189983B2Mar 13, 2007

LED modifying apparatus and method

3M INNOVATIVE PROPERTIES CO38 citations95
US7202490B2Apr 10, 2007

LED modifying apparatus and method

3M INNOVATIVE PROPERTIES CO22 citations91
US7957000B2Jun 7, 2011

Web inspection calibration system and related methods

3M INNOVATIVE PROPERTIES CO16 citations90
US7773226B2Aug 10, 2010

Web inspection calibration system and related methods

3M INNOVATIVE PROPERTIES CO23 citations90
US11143590B2Oct 12, 2021

Time-domain terahertz measurement system having a single reference surface

3M INNOVATIVE PROPERTIES CO5 citations71
US7969560B2Jun 28, 2011

Optical property sensor

3M INNOVATIVE PROPERTIES CO2 citations60

RIBNICK EVAN J

1 patent
US8965116B2Feb 24, 2015

Computer-aided assignment of ratings to digital samples of a manufactured web product

RIBNICK EVAN J4 citations68

HOFELDT DAVID L

1 patent
US9977154B2May 22, 2018

Precision control of web material having micro-replicated lens array

HOFELDT DAVID L2 citations65

TARNOWSKI CATHERINE P

1 patent
US9002072B2Apr 7, 2015

System for detection of non-uniformities in web-based materials

TARNOWSKI CATHERINE P5 citations63

3M INNOVATIVE PROPERTIES COMPANY

1 patent
US12123700B2Oct 22, 2024

Methods and systems for blown film thickness measurement

3M INNOVATIVE PROPERTIES COMPANY0 citations56

THEIS DANIEL J

1 patent
US8339573B2Dec 25, 2012

Method and apparatus for photoimaging a substrate

THEIS DANIEL J1 citations49