Em4, LLC
At a glance
Employees20-99
In business sinceNot reported
HeadquartersBedford, MA
US patents6
SAM.gov UEIELMKGCKJAM25
CAGE code3DNX8
Incorporated inDE
- Home Applications Products DFB Lasers
- nm Uncooled Mini-DIL Pump Lasers EM586
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
Patents
6 US patents granted 2007–2011, none of them in the five years to SEP 2025.
Optics 2Chemical engineering 1Measurement 1
- Flexible substrate with etched lens arrayUS 8,022,352 · granted SEP 20, 2011
- Hermetic fiber feedthroughUS 7,515,807 · granted APR 7, 2009
- Wavelength stabilization for broadband light sourcesUS 7,326,915 · granted FEB 5, 2008
- Reducing heating from non-coupled light in power transmitting optical fibersUS 7,309,175 · granted DEC 18, 2007
- Compound eye image sensor designUS 7,297,926 · granted NOV 20, 2007
Newest 5 shown · Granted to EM4, Inc. · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Em4, LLC | Bedford | MA | 20–99 | 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.