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Tamio Ishihara

USPTO Granted Patents = 13

Average Co-Inventor Count = 4.4

ph-index = 8

Forward Citations = 150(Granted Patents)

Location History:

Katsuta, JP (1986 - 1996)
Hitachinaka, JP (2001 - 2002)

Company Filing History:

13 out of 42,485

Hitachi Instrument Engineering Co., Ltd.

where one patent can have more than one assignee

Years Active: 1986-2002

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6444172 - Water quality meter and water quality monitoring system (2002-09-03),

2. 6398930 - Water quality meter and water quality monitoring system (2002-06-04),

3. 6290908 - Water quality meter and water monitoring system (2001-09-18),

4. 6245224 - Water quality management system (2001-06-12),

5. 5526698 - Capacitance type electromagnetic flowmeter (1996-06-18),

6. 5469746 - Electromagnetic flow meter (1995-11-28),

7. 5458003 - Electromagnetic flow meter (1995-10-17),

8. 5400659 - Electromagnetic flowmeter and manufacture method of same (1995-03-28),

9. 5307687 - Electromagnetic flowmeter (1994-05-03),

10. D319071 - Plotter (1991-08-13),

11. 4903045 - X-Y plotter for non-perforated paper (1990-02-20),

12. 4683480 - X-Y plotter drive roller arrangement (1987-07-28),

13. 4577409 - Pen changing apparatus for plotter (1986-03-25),

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