Steward Machine CO INC
At a glance
Employees100-499
In business sinceNot reported
HeadquartersBirmingham, AL
US patents5
SAM.gov UEIN9RBMY6ADG64
CAGE code9E328
Incorporated inAL
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 | 100–499 | 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.