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Trademarks = 1

Forward Citations = 190

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9 inventors (with patents filed for the assignee):

John Wippler (1 out of 2 patents)

Erwin J Fellner (1 out of 1 patent)

Charles J Arthur (1 out of 1 patent)

4. Donald G Davis (1 out of 1 patent)

5. David L Heitman (1 out of 1 patent)

6. Johannes A Van Haastert (1 out of 1 patent)

7. David C Brown (1 out of 1 patent)

8. James H Ryder (1 out of 2 patents)

9. Duane W Cowgill (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 4126131 - Facemask and goggle combination for excluding smoke or noxious gases (1978-11-21),

2. 4075715 - Helmet having anti-lift device (1978-02-28),

3. 4075714 - Helmet characterized by negative lift (1978-02-28),

4. 4059322 - Dust protective assembly for breakaway connectors (1977-11-22),

5. 4026245 - Personal restraint device (1977-05-31),

Sierra Engineering Co. is a leading engineering consulting firm specializing in civil engineering services. With a team of highly skilled professionals, we provide innovative and cost-effective solutions for a wide range of projects. Our services include site development, structural engineering, and construction management. We are committed to delivering high-quality results on time and within budget.

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

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USPTO Data Jan 1 1976 - Dec 30 2025

5 Patents

#1 in Sierra Madre, CA

#11,736 in California

#50,233 in US

Sierra Madre, CA, United States of America

Sierra Engineering Co.