Takumi Kajiwara

Follow

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Mechanical pencil
- Patent number 11,993,097
- Issue date May 28, 2024
- Kabushiki Kaisha Pilot Corporation
- Yusuke Sanada
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Ballpoint pen tip, ballpoint pen refill, and ballpoint pen
- Patent number 11,975,560
- Issue date May 7, 2024
- Kabushiki Kaisha Pilot Corporation
- Takumi Kajiwara
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Writing instrument for forming thermochromic handwriting
- Patent number 10,556,459
- Issue date Feb 11, 2020
- KABUSHIKI KAISHA PILOT CORPORATION (ALSO TRADING AS PILOT CORPORATION)
- Takumi Kajiwara
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Mechanical pencil
- Patent number 10,500,891
- Issue date Dec 10, 2019
- Kabushiki Kaisha Pilot Corporation
- Takumi Kajiwara
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Ballpoint pen tip and ballpoint pen using the same
- Patent number 9,346,313
- Issue date May 24, 2016
- KABUSHIKI KAISHA PILOT CORPORATION
- Kouichi Takayama
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
Ballpoint pen tip and ballpoint pen
- Patent number 8,430,591
- Issue date Apr 30, 2013
- Kabushiki Kaisha Pilot Corporation
- Keishi Okamoto
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

Information Patent Application
BALLPOINT PEN TIP, BALLPOINT PEN REFILL, AND BALLPOINT PEN
- Publication number 20230398807
- Publication date Dec 14, 2023
- KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)
- Takumi KAJIWARA
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
MECHANICAL PENCIL
- Publication number 20220410614
- Publication date Dec 29, 2022
- KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION )
- Yusuke SANADA
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
WRITING INSTRUMENT FOR FORMING THERMOCHROMIC HANDWRITING
- Publication number 20190047318
- Publication date Feb 14, 2019
- KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)
- Takumi KAJIWARA
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
MECHANICAL PENCIL
- Publication number 20180186173
- Publication date Jul 5, 2018
- KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)
- Takumi KAJIWARA
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Application
BALLPOINT PEN TIP AND BALLPOINT PEN USING THE SAME
- Publication number 20140147190
- Publication date May 29, 2014
- Kouichi Takayama
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES