Duramax Marine, LLC
At a glance
Employees100-499
In business sinceNot reported
HeadquartersHiram, OH
US patents21
SAM.gov UEIVD1NLZGAJ2L4
CAGE code1PNP7
Incorporated inOH
LEI549300LE8GNTMLA7Y130
Brands
This company sells these brands.
- heat exchangers
- seals
- impact systems
- naval brass
- DMX Polymer Alloy
- dock bumpers
- fenders
- tow knees
- military
- Infrastructure Division
Named on the company’s own website, read JUL 29, 2026
CareersCareers page — seen SEP 8, 2026
Supplier designations
For Profit OrganizationManufacturer of Goods
Self-certified by the company in its SAM.gov registration
Certifications
ISO 9001
Patents
21 US patents granted 2000–2020, none of them in the five years to SEP 2025.
Thermal processes and apparatus 9Mechanical elements 6Other special machines 4Transport 2
- Marine heat exchangerUS 10,697,703 · granted JUN 30, 2020
- Turbulence enhancer for keel coolerUS 10,179,637 · granted JAN 15, 2019
- Turbulence enhancer for keel coolerUS 9,957,030 · granted MAY 1, 2018
- Keel cooler with fluid flow diverterUS 8,376,029 · granted FEB 19, 2013
- Integral bearing unit made from a slippery/polymer alloyUS 7,490,992 · granted FEB 17, 2009
Newest 5 shown · Granted to Duramax Marine, LLC · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plants
2 FACILITIES| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Duramax Marine, LLC | Hiram | OH | 100–499 | ACTIVE |
| Duramax Marine Industries | Norwalk | OH | — | LIKELY ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.