Inventor · Tokyo, JP

Atsushi Ohba

62Patents
18h-index
45Co-inventors
84Inventor score

Filing activity: Aug 26, 1988 → Sep 10, 2021

Most-cited inventions

PatentTitleAreaCited byStatus
US5124589A Semiconductor integrated circuit capable of synchronous and asynchronous operations and operating method therefor Physics 126 Expired
US5991197A Semiconductor memory device having data protection feature Physics 68 Expired
US5808944A Semiconductor memory device having a defect relief arrangement Physics 57 Expired
US6330192A Nonvolatile semiconductor memory device and method of erasing data of nonvolatile semiconductor memory device Physics 57 Expired
US6144584A Non-volatile semiconductor memory device and method of manufacturing the same Electricity 51 Expired
US6356481B1 Row decoder for a nonvolatile memory with capability of selectively biasing word lines to positive or negative voltages Physics 44 Expired
US6069518A Semiconductor device allowing generation of desired internal voltage at high accuracy Physics 40 Expired
US5521864A Non-volatile semiconductor memory device allowing fast verifying operation Physics 36 Expired
US6270273A Liquid cosmetic container Human Necessities 36 Expired
US4997299A Cosmetic container Human Necessities 35 Expired
US5369619A Semiconductor memory device reading/writing data of multiple bits internally Physics 34 Expired
US5248946A Symmetrical differential amplifier circuit Electricity 30 Expired
US5554867A Nonvolatile semiconductor memory device having a memory cell transistor and a select transistor Electricity 29 Expired
US5999475A Internal potential generation circuit that can output a plurality of potentials, suppressing increase in circuit area Physics 29 Expired
US6515908B2 Nonvolatile semiconductor memory device having reduced erase time and method of erasing data of the same Physics 22 Expired
US5274597A Semiconductor memory device capable of driving divided word lines at high speed Physics 20 Expired
US5539691A Semiconductor memory device and method for reading and writing data therein Physics 18 Expired
US6567316B1 Nonvolatile semiconductor memory device and method of erasing data of nonvolatile semiconductor memory device Physics 18 Expired
US5216298A ECL input buffer for BiCMOS Electricity 17 Expired
US6504761B2 Non-volatile semiconductor memory device improved sense amplification configuration Physics 15 Expired
US5317213A Level converter with delay circuitry used to increase switching speed Electricity 12 Expired
US6293719A Cartridge type bar-shaped cosmetic material delivery container Human Necessities 11 Expired
US5879093A Mechanism for feeding stick type cosmetic materials, container employing the same and cartridge employed therein Human Necessities 10 Expired
US5239507A Semiconductor memory device with readout data buses connecting local and main sense amplifiers Physics 9 Expired
US6433583B1 CMOS switch circuit for transferring high voltages, in particular for line decoding in nonvolatile memories, with reduced consumption during switching Electricity 9 Expired

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