Steward Machine Co., INC.
At a glance
EmployeesNot reported
In business since1904
HeadquartersBirmingham, AL
US patents5
SAM.gov UEIN7P7U7QDKAK3
CAGE code88LN7
Incorporated inAL
Brands
This company sells these brands.
- machining
- engineering
- coatings
- inspection
- movable bridges
- aerospace
- metal fabrication
- welding
- three plant locations
- 000 square feet
Named on the company’s own website, read JUL 29, 2026
CareersCareers page — seen SEP 8, 2026
Supplier designations
For Profit OrganizationManufacturer of GoodsSubchapter S Corporation
Self-certified by the company in its SAM.gov registration
Patents
5 US patents granted 1994–2013, none of them in the five years to SEP 2025.
Civil engineering 4Electrical machinery, apparatus, energy 1
- Wear resisting span lock systemUS 8,590,086 · granted NOV 26, 2013
- Static stabilizers for bridgesUS 7,020,924 · granted APR 4, 2006
- Span lock with centering guideUS 6,701,562 · granted MAR 9, 2004
- Pre-load adjustment for span lock systemUS 6,588,041 · granted JUL 8, 2003
- Energy-absorbing span lock system for drawbridgesUS 5,327,605 · granted JUL 12, 1994
Granted to Steward Machine Co., Inc. · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Steward Machine Co., INC. | Birmingham | AL | — | 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.