Takayuki Ikai

Person

Yokohama-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Oil-based ink composition for writing utensils, writing utensil usi...
- Patent number 12,054,622
- Issue date Aug 6, 2024
- Mitsubishi Pencil Company, Limited
- Takayuki Ikai
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Writing tool provided with refill
- Patent number 11,654,711
- Issue date May 23, 2023
- MITSUBISHI PENCIL COMPANY, LIMITED
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Refill for writing implements and writing implements using the same
- Patent number 11,135,868
- Issue date Oct 5, 2021
- Mitsubishi Pencil Company, Limited
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Writing tool refill and writing tool using same
- Patent number 10,569,596
- Issue date Feb 25, 2020
- Mitsubishi Pencil Company, Limited
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Oil-based ink composition and uses thereof
- Patent number 7,381,754
- Issue date Jun 3, 2008
- Mitsubishi Pencil Co., Ltd.
- Shuuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Follower for non-aqueous ball point pen and non-aqueous ball point pen
- Patent number 7,311,459
- Issue date Dec 25, 2007
- Mitsubishi Pencil Kabushiki Kaisha
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Refill for oil-based ink ballpoint pen and oil-based ink ballpoint pen
- Patent number 6,945,726
- Issue date Sep 20, 2005
- Mitsubishi Pencil Co. Ltd.
- Syuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Oil-base ink composition, writing utensils and dyes to be used therein
- Patent number 6,830,611
- Issue date Dec 14, 2004
- Mitsubishi Pencil Co., Ltd.
- Shuuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Additive for oil-based ink for a ball point pen and oil based ink f...
- Patent number 6,441,061
- Issue date Aug 27, 2002
- Mitsubishi Pencil Kabushiki Kaisha
- Takayuki Ikai
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Ink for ball point pen
- Patent number 5,942,027
- Issue date Aug 24, 1999
- Mitsubishi Pencil Kabushiki Kaisha
- Takayuki Ikai
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

Information Patent Application
OILY INK COMPOSITION
- Publication number 20240150599
- Publication date May 9, 2024
- MITSUBISHI PENCIL COMPANY, LIMITED
- Takayuki IKAI
- B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
Information Patent Application
COLORING TABLET AND WATER-BASED INK COMPOSITION FOR WRITING INSTRUM...
- Publication number 20230072944
- Publication date Mar 9, 2023
- MITSUBISHI PENCIL COMPANY, LIMITED
- Tatsuya MIZOGUCHI
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
OIL-BASED INK COMPOSITION FOR WRITING UTENSILS, WRITING UTENSIL USI...
- Publication number 20220017760
- Publication date Jan 20, 2022
- MITSUBISHI PENCIL COMPANY, LIMITED
- Takayuki IKAI
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
WRITING TOOL PROVIDED WITH REFILL
- Publication number 20210178803
- Publication date Jun 17, 2021
- MITSUBISHI PENCIL COMPANY, LIMITED
- Takayuki IKAI
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
REFILL FOR WRITING IMPLEMENTS AND WRITING IMPLEMENTS USING THE SAME
- Publication number 20190337323
- Publication date Nov 7, 2019
- MITSUBISHI PENCIL COMPANY, LIMITED
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
WRITING TOOL REFILL AND WRITING TOOL USING SAME
- Publication number 20180236807
- Publication date Aug 23, 2018
- MITSUBISHI PENCIL COMPANY, LIMITED
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
COLORING COMPOSITION FOR PREVENTING SEE-THROUGH OF CLOTH, COLORING...
- Publication number 20100297901
- Publication date Nov 25, 2010
- MITSUBISHI PENCIL COMPANY, LIMITED
- Takayuki Ikai
- D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
Information Patent Application
Follower for non-aqueous ball point pen and non-aqueous ball point pen
- Publication number 20070020031
- Publication date Jan 25, 2007
- MITSUBISHI PENCIL KABUSHIKI KAISHA
- Takayuki Ikai
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Refill for oil-based ink ballpoint pen and oil-based ink ballpoint pen
- Publication number 20050123341
- Publication date Jun 9, 2005
- Mitsubishi Pencil Co., Ltd.
- Syuji Ichikawa
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
Oil-based ink composition and uses thereof
- Publication number 20030134937
- Publication date Jul 17, 2003
- MITSUBISHI PENCIL CO., LTD.
- Shuuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
Oil-base ink composition, writing utensils and dyes to be used therein
- Publication number 20030075074
- Publication date Apr 24, 2003
- Shuuji Ichikawa
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Takayuki Ikai

Person

Patents Grantslast 30 patents

Oil-based ink composition for writing utensils, writing utensil usi...

Writing tool provided with refill

Refill for writing implements and writing implements using the same

Writing tool refill and writing tool using same

Oil-based ink composition and uses thereof

Follower for non-aqueous ball point pen and non-aqueous ball point pen

Refill for oil-based ink ballpoint pen and oil-based ink ballpoint pen

Oil-base ink composition, writing utensils and dyes to be used therein

Additive for oil-based ink for a ball point pen and oil based ink f...

Ink for ball point pen

Patents Applicationslast 30 patents

OILY INK COMPOSITION

COLORING TABLET AND WATER-BASED INK COMPOSITION FOR WRITING INSTRUM...

OIL-BASED INK COMPOSITION FOR WRITING UTENSILS, WRITING UTENSIL USI...

WRITING TOOL PROVIDED WITH REFILL

REFILL FOR WRITING IMPLEMENTS AND WRITING IMPLEMENTS USING THE SAME

WRITING TOOL REFILL AND WRITING TOOL USING SAME

COLORING COMPOSITION FOR PREVENTING SEE-THROUGH OF CLOTH, COLORING...

Follower for non-aqueous ball point pen and non-aqueous ball point pen

Refill for oil-based ink ballpoint pen and oil-based ink ballpoint pen

Oil-based ink composition and uses thereof

Oil-base ink composition, writing utensils and dyes to be used therein