Inventor

EDGAR FREDERICK P

US3 patents

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

OPTICAL ENGINEERING COMPANY LL

2 patents

US6557174B2May 6, 2003

Replaceable, self-contained expanded viewing light shield cartridge for welding helmet

OPTICAL ENGINEERING COMPANY LL36 citations89

USD443394SJun 5, 2001

Safety helmet

OPTICAL ENGINEERING COMPANY LL17 citations89

EDGAR FREDERICK P

1 patent

US8214920B1Jul 10, 2012

Hard hat adapter for a welding helmet

EDGAR FREDERICK P62 citations92