For the Inventor, By the Inventor

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Danvers, MA, United States of America

Drd Diluter Corporation

USPTO Granted Patents = 3

Forward Citations = 85

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4 inventors (with patents filed for the assignee):

Humayun Qureshi (3 out of 6 patents)

Donald Schwartz (2 out of 2 patents)

Stanley M Liffmann (1 out of 5 patents)

4. John D Czaban (1 out of 3 patents)

3 patents: Sort by Forward Citations

1. 5383372 - Pipette (1995-01-24),

2. 5366904 - Method of metering a fluid using a multi-mode differential fluid (1994-11-22),

3. 5183765 - Means and method of measuring and dispensing (1993-02-02),

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USPTO Data Jan 1 1976 - Sep 29 2026

3 Patents

#21 in Danvers, MA

#3,960 in Massachusetts

#73,766 in US

Danvers, MA, United States of America

Drd Diluter Corporation

Forward Citations = 85

4 inventors:

Humayun Qureshi (3 out of 6 patents)

Donald Schwartz (2 out of 2 patents)

Stanley M Liffmann (1 out of 5 patents)

4. John D Czaban (1 out of 3 patents)

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