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Seymour, CT, United States of America

Summagraphics Corporation

USPTO Granted Patents = 68

CIPO Patents = 1

Forward Citations = 1,640

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42 inventors (with patents filed for the assignee):

Alexander M Purcell (12 out of 12 patents)

Thomas C Zalenski (10 out of 10 patents)

Robert M McDermott (7 out of 8 patents)

4. Charles D Zinsmeyer (5 out of 7 patents)

5. David A Siefer (5 out of 7 patents)

6. James A Parnell (4 out of 9 patents)

7. Michael J Padula (4 out of 4 patents)

8. Wayne J Murray (4 out of 4 patents)

9. Jamie L Barbetti (4 out of 5 patents)

10. John C Venthem (4 out of 5 patents)

11. Henry G Matthews (4 out of 4 patents)

12. Daniel A Ferrara (3 out of 49 patents)

13. Daniel G Lasley (3 out of 3 patents)

14. Albert L Whetstone (3 out of 6 patents)

15. William Valls (3 out of 8 patents)

Core Competencies:

Digitizer Tablet

Stylus

Position Determination

Calibration

Pressure Sensitive

Optical System

Graphics Tablet

Electro-Optical Mouse

Liquid Crystal Shutter

Low Power Sensing

Digital Tablet System

Magnetostrictive Transducers

68 patents: Sort by Forward Citations

1. 5581052 - Pressure sensitive stylus having resiliently compressible tip element (1996-12-03),

2. D358601 - Ribbon cassette for a printer (1995-05-23),

3. 5416280 - Digitizer tablet using relative phase detection (1995-05-16),

4. 5405205 - Sheet medium transport system, particularly for printers and plotters (1995-04-11),

5. 5383733 - Ribbon cassette for a printer (1995-01-24),

6. 5369227 - Stylus switch status determination in a digitizer tablet having a (1994-11-29),

7. 5333005 - Apparatus for raising and lowering plotter marking devices (1994-07-26),

8. 5316523 - Sprocket control apparatus (1994-05-31),

9. 5303624 - Apparatus for cutting sheet media (1994-04-19),

10. 5280309 - Single degree of freedom belt drive tensioning system for a plotter (1994-01-18),

11. 5267802 - Ribbon cassette storage and transfer apparatus for a printer (1993-12-07),

12. 5267401 - Method and apparatus for gauging reel diameters in a reel-to-reel sheet (1993-12-07),

13. 5229551 - Hysteresis compensation for a digitizer tablet (1993-07-20),

14. 5214448 - Belt-drive tensioning system which uses a pivoting member (1993-05-25),

15. 5210380 - Digitizer with serpentine-type conductor grid having uniform conductor (1993-05-11),

Summagraphics Corporation is a leading manufacturer of digitizing tablets and graphics tablets. With over 30 years of experience, Summagraphics offers a wide range of innovative and high-quality products for graphic design, CAD/CAM, and other applications. Their tablets are known for their precision, reliability, and seamless integration with popular software platforms. Visit their website to explore their product portfolio and learn more about how Summagraphics can enhance your digital workflow.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

68 Patents

#1 in Seymour, CT

#148 in Connecticut

#5,367 in US

#10,873 in the World

Seymour, CT, United States of America

Summagraphics Corporation

Forward Citations = 1,640

42 inventors:

Alexander M Purcell (12 out of 12 patents)

Thomas C Zalenski (10 out of 10 patents)

Robert M McDermott (7 out of 8 patents)

4. Charles D Zinsmeyer (5 out of 7 patents)

5. David A Siefer (5 out of 7 patents)

Please report any incorrect information to [email protected]

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