Em4, LLC
7 Oak Park Dr, Bedford, MA 01730
Operating signal within 12 months from two or more independent sources.
What they make
Semiconductor and Related Device Manufacturing334413--- EM4 – Reliable High-Performance Photonics Skip to content EM4 Reliable High-Performance Photonics Home Applications Products DFB Lasers and Modules 7 pin 10 mW - AA07010. --- SUMMARY:
SUMMARIZED FROM THE COMPANY’S OWN WEBSITE
Products
Recorded against the company rather than this address. Federal award and drug records name the company, not the plant, so we cannot say which of its sites makes these.
Where these came from
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Rsa | Bedford | Computer Storage Device Manufacturing 334112 | UNVERIFIED | 0.7 KM |
| Persimmon Technologies Corporation | Bedford | Semiconductor and Related Device Manufacturing 334413 | LIKELY ACTIVE | 0.9 KM |
| Cubicpv INC. | Bedford | Semiconductor and Related Device Manufacturing 334413 | ACTIVE | 1.2 KM |
| Sipex Corporation | Billerica | Other Electronic Component Manufacturing 334419 | UNVERIFIED | 1.3 KM |
| Schott Solar INC | Billerica | Semiconductor and Related Device Manufacturing 334413 | UNVERIFIED | 1.3 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 3 FEDERAL SOURCES, 9 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| SAM GOV | OPERATING | MAR 2026 | SEP 2026 |
| COMPANY SITE | OPERATING | JUL 2026 | AUG 2026 |
| OSHA ITA | OPERATING | DEC 2025 | DEC 2025 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | SAM GOV | — |
| CAGE CODE | SAM GOV | — |
| CITY | SAM GOV | — |
| EMPLOYEE BAND | OSHA ITA | DEC 2025 |
| GEOM | CENSUS GEOCODER | JUL 2026 |
| NAME | SAM GOV | — |
| REGISTRATION EXPIRATION | SAM GOV | — |
| STATE | SAM GOV | — |
| WEBSITE | SAM GOV | — |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.