Patent Attorneys (Domestic Department)

Yasuyuki Fujitani

Representative Patent Attorney / General Manager of Domestic Department
Register No.17342


Main Fields of Experience

General developments related to the fields of chemistry and biology, inorganic materials (metal materials, ceramics, semiconductor materials, dielectric materials, opt-catalysts, carbon materials, etc.), organic materials (polymer and monomer such as resin materials including elastomer, cellulose, silicone), biopolymers (sugar chains, etc.), bio-chemicals, drugs and medicines (herbal medicines, etc.), quasi-drug, materials for medical use, bio-materials, artificial bones, implants, medical instruments (endoscopes, stent, medicine dispensing apparatus, etc.), clinic and health related products, medicine formation technology, cell culture, functional gel materials, allergen detection technology, artificial muscles, health foods, inks, paints, coloring materials, phosphors, heat conductors, various powder materials (toner, pigment, ceramics particles, metal particles, fine resin particles, composite fine particles, etc.), various dispersants, magnetic materials, magnets, adhesive, pressure-sensitive adhesive, special papers, heat storage materials, energy-related technology, resource recovery technology, recycling, environment-related technology such as waste treatment, water treatment, refining technology, fermentation technology, hygiene-related technology, color development technology, chemical synthesis, derivative synthesis, various chemical analysis, various manufacturing processes, metal processing technology, pulverization technology, granulation technology, sintering technology, surface finishing technology (various plating technology, thin-film technology, plasma treatment, etc.), semiconductor mounting technology, various printing technologies (ink-jet related technology, screen printing, etc.), papermaking technology, recycle technology for papers, thin film formation apparatus, plasma apparatus, various printers (ink-jet printer, laser printer (development and fixation), 3-D printer), display devices (crystal display device, color filter, etc.), inks, cushioning materials, various sensors, printed circuit boards, batteries (lithium-ion battery, solar battery, etc.), watches, ornamentals, optical parts (micro lens, etc.), thermal-electro conversion elements, refrigerators, wire-less electric supply, exterior ornamental parts, interior ornamental parts, packages, automobile related technologies, clothes, and stationeries.

Kengo Ootsubo

Partner Patent Attorney
Register No.14488


Main Fields of Experience

General developments related to the fields of chemistry, polymer materials, development and fixing devices, semiconductor processing technology, image display devices ( liquid crystal devices, ETC.), projector, crystal devices, touch sensors, polishing machines, ink jet technology, plasma technology, robots, wearable devices, pointing devices, optical lenses, medical instruments (endoscope, etc.), seismic machines, adhesive sheets, business models, and refrigerators.

Designs, trademarks, copy right, unfair competition, and litigation cases thereof including expert opinions.

Mr. Tatsuya MASUDA decided to resign the representative of the domestic department on the end of June of 2023 and instead thereof Mr. Yasuyuki FUJITANI has succeeded the position of Mr. Tatsuya MASUDA from July of 2023. Mr. Tatsuya MASUDA continues to stay in our firm as a counsel. We look forward to continuing to work successfully with you under our new representative, Mr. Yasuyuki FUJITANI.