Inventor · Nara, JP

Hiroshige Hirano

85Patents
17h-index
42Co-inventors
84Inventor score

Filing activity: Jan 16, 1991 → Mar 14, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US6081036A Semiconductor device Electricity 131 Expired
US5179298A CMOS buffer circuit which is not influenced by bounce noise Electricity 128 Expired
US5650742A Voltage-level shifter Electricity 45 Expired
US5375093A Temperature detecting circuit and dynamic random access memory device Physics 39 Expired
US5675530A Ferroelectric memory device Physics 32 Expired
US5828619A Semiconductor memory device Physics 31 Expired
US5523974A Semiconductor memory device with redundant memory cell backup Physics 31 Expired
US5828615A Reference potential generator and a semiconductor memory device having the same Physics 30 Expired
US5751628A Ferroelectric memory devices and method for testing them Physics 30 Expired
US5515312A Semiconductor memory device Physics 29 Expired
US5163168A Pulse signal generator and redundancy selection signal generator Physics 27 Expired
US5392234A Semiconductor memory device Physics 26 Expired
US6118688A Ferroelectric memory device and method for driving it Physics 24 Expired
US5864247A Voltage detection circuit, power-on/off reset circuit, and semiconductor device Physics 20 Expired
US6157563A Ferroelectric memory system and method of driving the same Physics 19 Expired
US5969979A Ferroelectric memory device Physics 19 Expired
US5430671A Semiconductor memory device Physics 19 Expired
US6067265A Reference potential generator and a semiconductor memory device having the same Physics 14 Expired
US6912149B2 Ferroelectric memory device and method for reading data from the same Physics 14 Expired
US5898608A Method for operating a ferroelectric memory Physics 12 Expired
US6353550B1 Ferroelectric memory device Physics 10 Expired
US5546342A Semiconductor memory device including reverse and rewrite means Physics 9 Expired
US7696607B2 Semiconductor device Electricity 9 Active
US5694445A Semiconductor device with means for charge recycling Electricity 9 Expired
US5740114A Redundant memory cell selecting circuit having fuses coupled to memory cell group address and memory cell block address Physics 8 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.