Inventor

SHEFFIELD WILLIAM F

US21 patents

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

SHEFFIELD WILLIAM F

MINNESOTA MINING & MFG

Method of making an abrasive article

Method of making an abrasive article

Method of making an abrasive article

Abrading apparatus

Back-up pad for use with abrasive articles

Method of making an abrasive article

Abrading apparatus

Microwaveable adhesive article and method of use

Microwaveable adhesive article and method of use

Machine and method for poling films of pyroelectric and piezoelectric material

Machine and method for poling films of pyroelectric and piezoelectric material

Poling machine for continuous film of pyroelectric and/or piezoelectric material

3M INNOVATIVE PROPERTIES CO

Protective article having removable sheets and vertically staggered side edge, substrates protected therewith, and a method of use

Graffiti and/or environmental protective article having removable sheets, substrates protected therewith, and a method of use

Abrasive article

Abrasive article

Loop material for engagement with hooking stems

Repaired scratched and/or abraded transparent substrates having protective removable sheets thereon and a method of making

Abrasive article

Abrasive article

Method of repairing scratched and/or abraded transparent substrates and the repaired substrates