Company Filing History:

4 out of 5

Erma Optical Works, Ltd.

patents

Ulvac Service Corporation

where one patent can have more than one assignee

Years Active: 1978-1987

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5 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4680552 - Apparatus for measuring impurities in super-pure water without exposure (1987-07-14),

2. 4652364 - Apparatus for adjusting the concentration of a solution (1987-03-24),

3. 4629561 - Liquid chromatograph with flow controller (1986-12-16),

4. 4469495 - Method and device for degassifying liquid (1984-09-04),

5. 4126393 - High-sensitivity differential refractometer (1978-11-21),

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Location History:

Company Filing History:

Years Active: 1978-1987