Forward Citations = 260

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7 inventors (with patents filed for the assignee):

Lewis W Schmidt (6 out of 6 patents)

Darryl G Bettencourt (6 out of 8 patents)

James E Seiferling (3 out of 4 patents)

4. Thomas S Bettencourt (2 out of 8 patents)

5. Charles F Dietz (2 out of 4 patents)

6. George E Marshall, Jr (1 out of 2 patents)

7. Akos I Szoboszlay (1 out of 1 patent)

14 patents: Sort by Forward Citations

1. 4584826 - Tomato harvester (1986-04-29),

2. 4573124 - Height control for agricultural machine (1986-02-25),

3. 4570426 - Tomato harvester with improved separation of tomatoes from other picked (1986-02-18),

4. 4569037 - Apparatus for determining the distance from a predetermined point to a (1986-02-04),

5. 4567766 - Piezoelectric ultrasonic apparatus and method for determining the (1986-02-04),

6. 4414792 - Height control for agricultural machine (1983-11-15),

7. D263174 - Front dump refuse compactor (1982-02-23),

8. 4290352 - Refuse bin lid unit (1981-09-22),

9. 4271756 - Load retraction preventing finger array (1981-06-09),

10. D258737 - Rear dump refuse compactor (1981-03-31),

11. D258442 - Front dump refuse compactor (1981-03-03),

12. 4165897 - Refuse compactor with a counterbalanced rear door (1979-08-28),

13. 4152979 - Lid unit for a refuse compactor (1979-05-08),

14. 3961573 - Refuse bin with power-actuated compactor blade (1976-06-08),

Company Overview

Blackwelders is a specialized manufacturer based in Rio Vista, California, focusing on advanced welding technologies and solutions. The company is dedicated to developing innovative welding equipment and processes that enhance efficiency and precision in various industrial applications. With a commitment to quality and performance, Blackwelders serves a diverse range of sectors, including automotive, aerospace, and construction, positioning itself as a key player in the welding industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

14 Patents

#1 in Rio Vista, CA

#5,317 in California

#22,302 in US

#42,199 in the World

Rio Vista, CA, United States of America

Blackwelders

Forward Citations = 260

7 inventors:

Lewis W Schmidt (6 out of 6 patents)

Darryl G Bettencourt (6 out of 8 patents)

James E Seiferling (3 out of 4 patents)

4. Thomas S Bettencourt (2 out of 8 patents)

5. Charles F Dietz (2 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Blackwelders. Retrieved from https://idiyas.com/company/blackwelders

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]