Inventor · disambiguated record
Takumi Kajiwara
Also filed as: KAJIWARA TAKUMI
6 granted patents·15 citations·filing 2011–2021
70Inventor score
Technology areasB43K
Top patents by PatentIndex Score
6 records- 0188US8430591B1Ballpoint pen tip and ballpoint penOKAMOTO KEISHI·Filed 2012·Granted Apr 30, 2013·15 cites·12 claims
- 0253US11975560B2Ballpoint pen tip, ballpoint pen refill, and ballpoint penPILOT CORPORATION KK·Filed 2021·Granted May 7, 2024·0 cites·9 claims
- 0352US10556459B2Writing instrument for forming thermochromic handwritingPILOT CORPORATION KK·Filed 2016·Granted Feb 11, 2020·0 cites·10 claims
- 0448US11993097B2Mechanical pencilPILOT CORPORATION KK·Filed 2020·Granted May 28, 2024·0 cites·10 claims
- 0536US10500891B2Mechanical pencilPILOT CORPORATION KK·Filed 2016·Granted Dec 10, 2019·0 cites·12 claims
- 0636US9346313B2Ballpoint pen tip and ballpoint pen using the sameTAKAYAMA KOUICHI·Filed 2011·Granted May 24, 2016·0 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →