Hiroshi Ohyama
9Patents
5h-index
26Co-inventors
59Inventor score
Filing activity: Jun 15, 1978 → Nov 15, 1990
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4752326A | 1-arylpyrazoles, composition containing them, and herbicidal method of using them | Chemistry; Metallurgy | 30 | Expired |
| US4447259A | 2-(Substituted phenoxy)propionic acid derivatives and their uses for herbicidal purposes | Chemistry; Metallurgy | 16 | Expired |
| US4420486A | Benzoxazolone derivatives, processes for preparation thereof and compositions containing them | Human Necessities | 10 | Expired |
| US5116838A | Guanidine derivatives and fungicides for agriculture and horticulture containing the same | Chemistry; Metallurgy | 6 | Expired |
| US4512989A | 1,2,4-Triazole derivatives and fungicidal composition containing the same | Chemistry; Metallurgy | 5 | Expired |
| US4405743A | Pyrazolylpyrimidine derivatives | Chemistry; Metallurgy | 3 | Expired |
| US4822814A | New 1,3-dithiol-2-ylidene-alkylsulfonylacetates and their uses | Human Necessities | 3 | Expired |
| US4391804A | Imidazole derivatives and fungicidal composition containing the same | Chemistry; Metallurgy | 3 | Expired |
| US4255183A | Substituted phenyl urea and herbicides for use in paddy field | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.