Forward Citations = 61

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2 inventors (with patents filed for the assignee):

David C Pollock (4 out of 10 patents)

Dennis Z Mraz (1 out of 25 patents)

5 patents: Sort by Forward Citations

1. 5660724 - Multi-pressure head tank for use with vertical shaft bioreactors (1997-08-26),

2. 5651892 - Biodegradeable effluent nutrient removal (1997-07-29),

3. 5650070 - Aerobic long vertical shaft bioreactors (1997-07-22),

4. 5645726 - Treatment of waste liquor in a vertical shaft bioreactor (1997-07-08),

5. 5513903 - Method and apparatus for developing shafts using small diameter shafts (1996-05-07),

Deep Shaft Technology, Inc. is a leading provider of innovative solutions for deep shaft construction and maintenance projects. With a team of experienced engineers and state-of-the-art technology, we specialize in designing and implementing cutting-edge solutions for challenging underground environments. Our services include shaft sinking, lining, and rehabilitation, as well as shaft monitoring and maintenance to ensure the safety and efficiency of projects. Contact us today to learn more about how Deep Shaft Technology can help with your next deep shaft project.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

5 Patents

#330 in

#2,848 in Canada

CA

Deep Shaft Technology, Inc.

Forward Citations = 61

2 inventors:

David C Pollock (4 out of 10 patents)

Dennis Z Mraz (1 out of 25 patents)

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