Inventor
KOYAMA SHOJI
JP9 patents
⚠️ This page may combine multiple inventors who share the name “KOYAMA SHOJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
6 patentsUS5517044AMay 14, 1996
Non-volatile semiconductor memory device having thin film transistors equipped with floating gates
NEC CORP95 citations95
US5429968AJul 4, 1995
Method of forming a mask programmable read only memory device with multi-level memory cell array
NEC CORP91 citations95
US4630085ADec 16, 1986
Erasable, programmable read-only memory device
NEC CORP112 citations95
US5321286AJun 14, 1994
Non-volatile semiconductor memory device having thin film memory transistors stacked over associated selecting transistors
NEC CORP90 citations94
US5291440AMar 1, 1994
Non-volatile programmable read only memory device having a plurality of memory cells each implemented by a memory transistor and a switching transistor stacked thereon
NEC CORP26 citations91
US5274587ADec 28, 1993
Non-volatile programmable read only memory device having memory cells each implemented by a memory transistor and a switching transistor coupled in parallel and method of memorizing a data bit
NEC CORP4 citations61