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For the Inventor, By the Inventor

Oakland, CA, United States of America

Rainin Instrument, LLC


USPTO Granted Patents = 26

% Expired Patents = 11.5


Trademarks = 9

Forward Citations = 538

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25 inventors (with patents filed for the assignee):

goldMedal James S Petrek (18 out of 43 patents)

silverMedal William D Homberg (10 out of 21 patents)

bronzeMedal Kenneth Rainin (9 out of 33 patents)

4.  Haakon T Magnussen (7 out of 19 patents)

5.  Phillip Yee (4 out of 79 patents)

6.  Andrew Vainshtein (3 out of 3 patents)

7.  Tark Abed (2 out of 37 patents)

8.  Michael C Schmittdiel (2 out of 4 patents)

9.  Christian K Apple (2 out of 2 patents)

10.  Steven T Nielsen (2 out of 6 patents)

11.  Albert Y Wang (2 out of 2 patents)

12.  Joshua T Druker (2 out of 91 patents)

13.  Christopher F Kelly (1 out of 24 patents)

14.  Deryl Stanley (1 out of 3 patents)

15.  Haoyu Feng (1 out of 14 patents)


Core Competencies:
Air Displacement
Electronic Pipette
Manual Pipette
Pipette Tip
Tip Ejector
Volume Adjustment
Handheld Design
Hybrid Pipette
Damped Plunger
Sealing Tip
Nozzle Spacing
Ergonomic Design

26 patents:

1. 9221046 - Air displacement pipette with enhanced blowout (2015-12-29),
2. 8871157 - Electronic pipette with two-axis controller (2014-10-28),
3. D701321 - Handheld electronic pipette (2014-03-18),
4. 8524170 - Pipette and sealing tip (2013-09-03),
5. 8397593 - Quick-set pipette with damped plunger (2013-03-19),
6. D672469 - Handheld pipette (2012-12-11),
7. 7947234 - Liquid end assembly for a handheld multichannel pipette with adjustable nozzle spacing (2011-05-24),
8. 7819030 - Hybrid manual-electronic pipette (2010-10-26),
9. 7788986 - Hybrid manual-electronic pipette (2010-09-07),
10. 7770475 - Hybrid manual-electronic pipette (2010-08-10),
11. 7726212 - Hybrid manual-electronic pipette (2010-06-01),
12. 7175813 - Volume adjustable manual pipette with quick set volume adjustment (2007-02-13),
13. 6967004 - Pipette with improved pipette tip and mounting shaft (2005-11-22),
14. 6871557 - Pipette device with tip ejector utilizing stored energy (2005-03-29),
15. 6745636 - Pipette with improved pipette tip and mounting shaft (2004-06-08),
Company Overview
Rainin Instrument, LLC, based in Oakland, California, specializes in the development and manufacturing of precision liquid handling instruments and laboratory equipment. The company is renowned for its innovative pipetting solutions, which are essential in various scientific fields, including biotechnology, pharmaceuticals, and environmental testing. Rainin is committed to enhancing laboratory efficiency and accuracy through advanced technology and user-friendly designs, catering to a global clientele in research and clinical settings.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

26 Patents

#16 in Oakland, CA

#3,041 in California

#12,859 in US

#24,806 in the World

Oakland, CA (US)
Oakland, CA, United States of America

Rainin Instrument, LLC

Forward Citations = 538

25 inventors:

goldMedal James S Petrek (18 out of 43 patents)

silverMedal William D Homberg (10 out of 21 patents)

bronzeMedal Kenneth Rainin (9 out of 33 patents)

4.  Haakon T Magnussen (7 out of 19 patents)

5.  Phillip Yee (4 out of 79 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Rainin Instrument, LLC. Retrieved from https://idiyas.com/company/rainin-instrument

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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