Ishihara Sangyo Kaisha, Ltd.
58 live US trademarks, filing since 1981. 4 new applications filed this year.
Marks held on the register, by filing date. 2026 is year to date.
A multi-class mark counts once per class. Rank shown where the owner is in the class's top 50.
What Ishihara Sangyo Kaisha, Ltd. filed most recently.
| Mark | Class | Filed | Basis | Status | Serial |
|---|---|---|---|---|---|
| ZELEN | 5 | Aug 11, 2026 | — | published · closes Dec 3 | 50043602 |
| OHAYO | 5 | Jul 9, 2026 | — | published · closes Dec 3 | 99930596 |
| NAOSHI | 5 | Jul 9, 2026 | — | published · closes Dec 3 | 99930605 |
| TOLPRYXA | 1, 5 | May 12, 2026 | — | pending | 99818650 |
| ＭＰＴ | 1, 2 | Nov 27, 2025 | — | pending | 79442283 |
| TACHI | 5 | Nov 5, 2025 | — | published | 99481504 |
| HANABI | 5 | Nov 5, 2025 | — | published | 99481484 |
| NAKAMA | 5 | Sep 17, 2025 | — | published | 99397322 |
| HOSHI | 5 | Sep 17, 2025 | — | published | 99397356 |
| KUSABI | 5 | Sep 17, 2025 | — | published | 99397378 |
Registration starts the maintenance clock: a Section 8 declaration is due between years 5 and 6.
A filing missed by the due date enters a six-month grace period, then the registration cancels.
About Ishihara Sangyo Kaisha, Ltd. trademarks.
How many trademarks does Ishihara Sangyo Kaisha, Ltd. have?
58 live US trademarks as of October 23, 2026: 41 registered and 17 pending applications. 4 were filed in 2026 so far.
What does Ishihara Sangyo Kaisha, Ltd. sell, according to its trademarks?
Mostly pharmaceuticals (Class 5, 51 live marks). Also paints & coatings (Class 2) and chemicals (Class 1).
Who owns the ISK trademark?
ISK is owned by Ishihara Sangyo Kaisha, Ltd.. It was registered on September 28, 1982 (Reg. No. 1210173) and is live. The same owner holds 57 other live US marks.
When did Ishihara Sangyo Kaisha, Ltd. first file a trademark?
Its oldest live US filing dates from 1981: ISK, filed September 17, 1981.
Know the morning after Ishihara Sangyo Kaisha, Ltd. files.
Watch this company in Thorgate and get an alert for every new application, registration, publication and lapse, with the opposition deadline already worked out. Or monitor your own marks for conflicts with theirs.
Data: USPTO trademark bulk files, processed nightly by Thorgate. Last rebuilt October 23, 2026. Counts cover the US federal register only, not state or foreign marks. Owner names are shown as recorded by the USPTO. This page reports public-record facts and dates and is not legal advice. For the official record of any mark, follow its serial number to USPTO TSDR.