Inventor · Yokohama, JP

Ryuji Ohba

22Patents

6h-index

14Co-inventors

66Inventor score

Filing activity: Sep 12, 1996 → Sep 6, 2018

Most-cited inventions

Patent	Title	Area	Cited by	Status
US6680505B2	Semiconductor storage element	Electricity	41	Expired
US5734181A	Semiconductor device and manufacturing method therefor	Electricity	31	Expired
US8587050B2	Semiconductor memory	Physics	19	Active
US8307022B2	Random number generating device	Electricity	8	Active
US7111029B2	Random number generating circuit	Physics	7	Expired
US8039890B2	Random number generating device	Electricity	6	Active
US7573094B2	Random number generating element	Physics	5	Expired
US8969843B2	Memory device	Electricity	5	Active
US7629642B2	Semiconductor device	Electricity	5	Active
US6690030B2	Semiconductor device with negative differential resistance characteristics	Electricity	3	Expired
US6787795B2	Logic apparatus and logic circuit	Electricity	2	Expired
US9061898B2	Memory device	Electricity	1	Active
US8916923B2	Nonvolatile semiconductor memory	Electricity	1	Active
US8890231B2	Nonvolatile semiconductor memory device with a narrowing charge storage layer	Electricity	1	Active
US10903228B2	Semiconductor storage device	Electricity	1	Active
US8115248B2	Semiconductor device and method for manufacturing the same	Electricity	1	Active
US9721654B1	Memory device	Physics	1	Active
US10658480B2	Memory device	Electricity	1	Active
US8742489B2	Nonvolatile semiconductor memory	Electricity	0	Active
US9041091B2	Nonvolatile semiconductor memory device	Electricity	0	Active
USRE44630E1	Semiconductor device and method for manufacturing the same	General	0	Active
US7138651B2	Logic apparatus and logic circuit	Electricity	0	Expired

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