Inventor

RICHARDS IVAN

US2 patents

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

UPJOHN CO

1 patent

US6890920B2May 10, 2005

Quaternary ammonium compounds

UPJOHN CO29 citations87

PFIZER

1 patent

US7439397B2Oct 21, 2008

Phenol derivative

PFIZER1 citations57