P
PatentIndex
Search
Landscape
Sign in
Inventor
LEVITT MICHAEL
US
4 patents
⚠️ This page may combine multiple inventors who share the name “LEVITT MICHAEL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AMGEN INC
2 patents
US4914031A
Apr 3, 1990
Subtilisin analogs
AMGEN INC
117 citations
94
US5397705A
Mar 14, 1995
Multiply mutated subtilisins
AMGEN INC
52 citations
88
(unassigned)
1 patent
US5437399A
Aug 1, 1995
Device for holding writing instruments
26 citations
87
LEVITT MICHAEL
1 patent
US5289961A
Mar 1, 1994
Device for holding writing instruments
LEVITT MICHAEL
20 citations
80