Company lists · Data refreshed September 2026

Top 12 Atomic time clock manufacturers based in the United States

RevenueBase identified 28 company matches for atomic time clock manufacturers associated with the United States as of September 2026 and tracks 576 professional contacts across them, including 126 with verified work emails. Medfield is the largest hub.

This list covers company matches for atomic time clock manufacturers associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built
28Companies
576Contacts tracked
126Verified emails
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The 12 largest atomic time clock manufacturers based in the United States

Ranked by team size
Top 12 of 28 company matches for atomic time clock manufacturers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchAliso Viejo, CA, United StatesHQ recorded Sep 29, 20261,001-5,000177 contacts →

Exact match

“Symmetricom was acquired by Microsemi Corporation in November 2013.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchLake Geneva, WI, United StatesHQ recorded Sep 29, 202651-20088 contacts →

Exact match

“Primex is a global market leader of synchronized time, advanced monitoring and facility compliance technologies that improve operational efficiency and reduce risk for Healthcare…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchSanta Ana, CA, United StatesHQ recorded Sep 29, 202611-5039 contacts →

Exact match

“Brandywine Communications is the premier supplier of GPS and time code based precision time and frequency products.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchSt. Charles, MO, United StatesHQ recorded Sep 29, 202611-5022 contacts →

Exact match

“Masterclock designs and manufactures a variety of precise timekeeping products to keep both facilities and people synchronized.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchChelsea, MA, United StatesHQ recorded Sep 29, 202611-5017 contacts →

Exact match

“Founded in 1897, Chelsea Clock is the oldest and one of the largest clock making companies in the United States.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchIndependence, MO, United StatesHQ recorded Sep 29, 202611-5011 contacts →

Exact match

“NOVUS is a United States Original Brand Manufacturer of precision timing products, including Rubidium and GNSS locked frequency references, PTP/NTP time servers, distribution…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchMedfield, MA, United StatesHQ recorded Sep 29, 202651-20010 contacts →

Exact match

“For over 80 years, Electric Time® has been a master in the art of handcrafted clock manufacture and design.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchWakefield, MA, United StatesHQ recorded Sep 29, 202611-508 contacts →

Exact match

“Precise Time and Frequency, LLC is part of the LGL Group, along with sister company MtronPTI.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchValley Stream, NY, United StatesHQ recorded Sep 29, 202611-504 contacts →

Exact match

“Westclox was originally established in 1884 as United Clock Company of Peru, Illinois based on a new, innovative idea by Charles Stahlberg.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchSan Jose, CA, United StatesHQ recorded Sep 29, 202611-504 contacts →

Exact match

“Qulsar activates new applications and capabilities made possible by precisely synchronized time.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchLoughman, FL, United StatesHQ recorded Sep 29, 20261-102 contacts →

Exact match

“In the ever-evolving landscape of timekeeping technology, the paradigm has shifted with the emergence of Top Tech Clocks, redefining the standards for time zone precision.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchSan Clemente, CA, United StatesHQ recorded Sep 29, 20261-102 contacts →

Exact match

“ORCA Technologies manufactures custom high-precision time and frequency products and is managed by a team that has over 30 years of product design, management, and application…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 12 of 28 atomic time clock manufacturers based in the United States

See the full list, filter by size, metro and specialty, and access 126 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Atomic time clock manufacturers based in the United States at a glance

As of Sep 29, 2026
21.9%Verified-email coverage
20.6Average contacts per company
11-50Median size (employees)
7.1%Largest-city concentration · Medfield
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
7
11-50
13
51-200
6
201-500
1
1,001-5,000
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 28 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “atomic time clock manufacturers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 126 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “atomic time clock manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many atomic time clock manufacturers are there based in the United States?

RevenueBase identified 28 company matches for atomic time clock manufacturers associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Symmetricom IS NOW Microsemi tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most atomic time clock manufacturers?

Medfield leads with 2 company records, followed by Valley Stream (2) and Aliso Viejo (1).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 126 professional contacts with verified work emails tracked across these 28 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.