Inventor

SANDAHL JOEL ERNEST

US2 patents

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

ENHANCED MESSAGING SYSTEMS INC

1 patent

US6965297B1Nov 15, 2005

Wide area radio paging system

ENHANCED MESSAGING SYSTEMS INC14 citations72

ROLLED RIBBON BATTERY COMPANY LLC

1 patent

US12463236B2Nov 4, 2025

Electrochemical device having spiral wound electrodes

ROLLED RIBBON BATTERY COMPANY LLC0 citations31