Ancos Co., Ltd.

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6540422 Push-out-type writing implementExpiredMay 15, 02Apr 01, 03[B23K]
5915867 Capless writing toolExpiredMay 28, 96Jun 29, 99[B43K]
5048990 Writing instrument with drying-preventing mechanismExpiredNov 06, 87Sep 17, 91[B43K]
4979839 Mechanical pencil having an automatic lead extending mechanismExpiredMar 03, 89Dec 25, 90[B43K]
4966483 Valve operating mechanismExpiredNov 07, 88Oct 30, 90[B43K]
4911569 Mechanical pencil with a fluid actuatorExpiredJan 10, 89Mar 27, 90[B43K]
4629348 Writing instrument with sealing cap and additional rearward sealExpiredJan 27, 84Dec 16, 86[B43K]
4575271 Writing instrument with movable closure and second sealing meansExpiredSep 06, 83Mar 11, 86[B43K]
4544295 Mechanical pencil with self-contained insertExpiredJun 03, 83Oct 01, 85[B43K]
4479732 Writing instrument with sealing cap retained in tipExpiredJul 02, 82Oct 30, 84[B43K]
4469462 Writing instrument with sealing tipExpiredJul 02, 82Sep 04, 84[B43K]
4382706 Mechanical pencilExpiredMay 04, 81May 10, 83[B43K]
4362410 Mechanical pencilExpiredMay 23, 80Dec 07, 82[B43K]
4358210 Mechanical pencil with chuck closing by normal writing gripExpiredNov 14, 79Nov 09, 82[B43K]
4270870 Mechanical pencil with chuck closing by normal writing gripExpiredMay 09, 78Jun 02, 81[B43K]
4269524 Mechanical pencilExpiredApr 17, 79May 26, 81[B43K]
4218153 Mechanical pencilExpiredMar 30, 79Aug 19, 80[B43K]

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