Leco CORP
At a glance
Employees500+
In business since1936
HeadquartersSaint Joseph, MI
US patents193
SAM.gov UEIFW9WDP2HN4B6
CAGE code94174
Incorporated inMI
- instruments
- elemental analysis
- thermal analysis
- mass spectrometry
- laboratory equipment
- samples
- battery analysis
- building
- construction
- fuels
Named on the company’s own website, read JUL 29, 2026
Open positions
Openings read from Leco CORP’s own job board on ADP, last checked OCT 26, 2026. FactoryRegistry does not host applications — each title opens the posting where the company published it.
- Assistant Service ManagerLeco CORP · St. Joseph, MI, US · posted OCT 22, 2026
- Stockroom AssociateLeco CORP · St. Joseph, MI, US · posted OCT 21, 2026
- Electronics Technician ILeco CORP · St. Joseph, MI, US · posted OCT 20, 2026
- Field Service Engineer - SouthwesternUS · posted OCT 19, 2026
- Universal Utility OperatorBenton Harbor, MI, US · posted OCT 16, 2026
- Production Assembler BLeco CORP · St. Joseph, MI, US · posted OCT 16, 2026
- Machinist 2-1Bellefonte, PA, US · posted OCT 15, 2026
- Field Service Engineer - SoutheasternUS · posted OCT 15, 2026
- Machinist 1-1Leco CORP · St. Joseph, MI, US · posted OCT 10, 2026
- Quality TechnicianLeco CORP · St. Joseph, MI, US · posted OCT 9, 2026
16 more on the company’s board
Supplier designations
For Profit OrganizationManufacturer of Goods
Self-certified by the company in its SAM.gov registration
Patents
193 US patents granted 1976–2024, 18 of them in the five years to SEP 2025, including 3 design patents.
Measurement 99Electrical machinery, apparatus, energy 67Thermal processes and apparatus 9Other special machines 5Materials, metallurgy 4
- Multi-dimensional chromatography modulator with variable modulation periodUS 12,140,576 · granted NOV 12, 2024
- Methods and systems for multi-pass encoded frequency pushingUS 12,100,584 · granted SEP 24, 2024
- Thermal modulatorUS 12,025,595 · granted JUL 2, 2024
- Method for ranking library hits in mass spectrometryUS 11,994,501 · granted MAY 28, 2024
- Access port for a thermogravimetric analyzer furnaceUS 11,899,033 · granted FEB 13, 2024
Newest 5 shown · Granted to LECO Corporation · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Leco CORP | Saint Joseph | MI | 500+ | 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.


