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Yaichiro Watakabe

USPTO Granted Patents = 17

Average Co-Inventor Count = 2.4

ph-index = 10

Forward Citations = 281(Granted Patents)

Location History:

Itami, JP (1979 - 1991)
Hyogo, JP (1990 - 1998)

Company Filing History:

17 out of 21,351

Mitsubishi Denki Kabushiki Kaisha

Ulvac Coating Corporation

where one patent can have more than one assignee

Years Active: 1979-1998

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5830607 - Phase shift mask and manufacturing method thereof and exposure method (1998-11-03),

2. 5691090 - Phase shift mask and manufacturing method thereof and exposure method (1997-11-25),

3. 5674647 - Phase shift mask and manufacturing method thereof and exposure method (1997-10-07),

4. 5629114 - Phase shift mask and manufacturing method thereof and exposure method (1997-05-13),

5. 5474864 - Phase shift mask and manufacturing method thereof and exposure method (1995-12-12),

6. 5322748 - Photomask and a method of manufacturing thereof comprising trapezoidal (1994-06-21),

7. 5266424 - Method of forming pattern and method of manufacturing photomask using (1993-11-30),

8. 4985319 - Process for manufacturing a photomask (1991-01-15),

9. 4957834 - Method for manufacturing photomask (1990-09-18),

10. 4876164 - Process for manufacturing a photomask (1989-10-24),

11. 4873163 - Photomask material (1989-10-10),

12. 4792461 - Method of forming a photomask material (1988-12-20),

13. 4783371 - Photomask material (1988-11-08),

14. 4722878 - Photomask material (1988-02-02),

15. 4717625 - Photomask material (1988-01-05),

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