% Expired Patents = 11.1

CIPO Patents = 3

EPO Patents = 3

Forward Citations = 25

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3 inventors (with patents filed for the assignee):

Rudolph A Hall (8 out of 8 patents)

Ralph L Shaw (3 out of 3 patents)

Conrad M Fritz (1 out of 3 patents)

4. Raph L Shaw (0 patent)

9 patents: Sort by Forward Citations

1. 9725868 - Offshore support structure (2017-08-08),

2. 8888414 - Grouted cylindrical connection utilizing bearing surfaces for offshore monopile foundations (2014-11-18),

3. 8511940 - Offshore support structure and associated method of installing (2013-08-20),

4. 8444349 - Grouted pile splice and method of forming a grouted pile splice (2013-05-21),

5. 7942611 - Offshore structure support (2011-05-17),

6. 7198453 - Offshore structure support and foundation for use with a wind turbine and an associated method of assembly (2007-04-03),

7. 7134809 - Offshores structure support (2006-11-14),

8. 6783305 - Offshore structure support (2004-08-31),

9. 4635330 - Method of assembling high-performance low-torque anti-friction bearing (1987-01-13),

Company Overview

Keystone Engineering Inc. is a leading engineering firm specializing in providing innovative and cost-effective engineering solutions to clients in various industries. With a team of experienced engineers and technicians, Keystone Engineering Inc. offers a wide range of services including structural engineering, civil engineering, and mechanical engineering. Known for their expertise and commitment to quality, Keystone Engineering Inc. has established a strong reputation for delivering successful projects on time and within budget.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

9 Patents

#3 in Mandeville, LA

#106 in Louisiana

#32,565 in US

Mandeville, LA, United States of America

Keystone Engineering Inc.

Forward Citations = 25

3 inventors:

Rudolph A Hall (8 out of 8 patents)

Ralph L Shaw (3 out of 3 patents)

Conrad M Fritz (1 out of 3 patents)

4. Raph L Shaw (0 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Keystone Engineering Inc.. Retrieved from https://idiyas.com/company/keystone-engineering

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]

3 patents (CIPO):

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]

3 patents (EPO):

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]