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For the Inventor, By the Inventor

Liechtenstein, United States of America

Gersan Establishment


USPTO Granted Patents = 25

% Expired Patents = 4.0


Forward Citations = 294

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30 inventors (with patents filed for the assignee):

goldMedal Martin P Smith (13 out of 17 patents)

silverMedal Martin Cooper (8 out of 9 patents)

bronzeMedal Christopher M Welbourn (8 out of 12 patents)

4.  James Gordon Smith (5 out of 5 patents)

5.  Robin W Smith (5 out of 7 patents)

6.  Paul Martyn Spear (4 out of 7 patents)

7.  James Gordon Charters Smith (3 out of 13 patents)

8.  Michael Peter Gaukroger (2 out of 7 patents)

9.  Philip Maurice Martineau (2 out of 26 patents)

10.  Andrew D Stewart (2 out of 11 patents)

11.  Timothy James Osgood (2 out of 2 patents)

12.  David Antony Homer (2 out of 4 patents)

13.  Graham Maurice Brown (2 out of 2 patents)

14.  Martin Philip Gouch (1 out of 44 patents)

15.  Graham Ralph Powell (1 out of 4 patents)


Core Competencies:
Gemstone
Diamond Marking
Optical Inspection
Natural Diamond
Synthetic Diamond
Shape Sorting
Detection Methods
Crystal Misorientation
Frequency Sensing
Sorting Techniques
Feed Control
Examining Apparatus

25 patents:

1. D460470 - Viewer for gemstones (2002-07-17),
2. 6391215 - Diamond marking (2002-05-21),
3. 6358427 - Marking diamond (2002-03-19),
4. 6331708 - Examining a diamond (2001-12-18),
5. 6187213 - Marking diamond (2001-02-13),
6. D427617 - Apparatus for viewing gemstones (2000-07-04),
7. 6014208 - Examining a diamond (2000-01-11),
8. 5883388 - Examining a diamond (1999-03-16),
9. 5880504 - Examining a diamond (1999-03-09),
10. 5835200 - Method and apparatus for examining an object (1998-11-10),
11. 5811824 - Method and an apparatus for testing whether a diamond has a layer of (1998-09-22),
12. 5801819 - Distinguishing natural from synthetic diamond (1998-09-01),
13. 5746645 - Working a natural or synthetic hard stone such as a gemstone (1998-05-05),
14. 5628410 - Classifying or sorting (1997-05-13),
15. 5603414 - Detecting diamonds in a rock sample (1997-02-18),
Company Overview
Gersan Establishment is a prominent entity based in Liechtenstein, specializing in the development and manufacturing of advanced technological solutions. The company focuses on a diverse range of sectors, including industrial automation, electronic systems, and innovative engineering solutions. With a commitment to research and development, Gersan aims to enhance efficiency and performance across various applications, catering to both local and international markets. Its expertise positions the company as a key player in the evolving landscape of technology and engineering.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

25 Patents

#1 in Liechtenstein, undefined

#47 in

#525 in US

#25,710 in the World

Liechtenstein, US
Liechtenstein, United States of America

Gersan Establishment

Forward Citations = 294

30 inventors:

goldMedal Martin P Smith (13 out of 17 patents)

silverMedal Martin Cooper (8 out of 9 patents)

bronzeMedal Christopher M Welbourn (8 out of 12 patents)

4.  James Gordon Smith (5 out of 5 patents)

5.  Robin W Smith (5 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gersan Establishment. Retrieved from https://idiyas.com/company/gersan-establishment

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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