Company Filing History:

4 out of 1,233

Tokyo Ohka Kogyo Co., Ltd.

patents

Years Active: 1994-2000

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4 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6083657 - Positive photoresist compositions and a process for producing the same (2000-07-04),

2. 5702862 - Positive photoresist coating solution comprising a mixed solvent of (1997-12-30),

3. 5604077 - Positive-working photoresist composition comprising a novolac resin made (1997-02-18),

4. 5332647 - Positive-working quinone diazide composition containing (1994-07-26),

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For the Inventor, By the Inventor

Hayato Ohno

Location History:

Company Filing History:

Years Active: 1994-2000