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Clearfield, Inc. (CLFD)

Nasdaq: CLFD · Telephone & Telegraph Apparatus · Brooklyn Park, MN · filing with the SEC since 1995
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Patents

US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026

78 patents granted to the 4 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to Clearfield, Inc.’s names, not what it holds today.

Patents granted
78
77 utility, 1 design, 1976 to Dec 31, 2025
Granted in 2025
6
Against 8 in 2024 and 11 in 2023
Applications published
73
3 of them in 2025
Names they are printed under
4
its own name, a former name
By yearGrantedApplications published
'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
Optics33
Handling2
Telecommunications1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name4 counted
Clearfield, Inc. its own name
US, as the owner printed on each patent
61 granted
6 published
Clearfield, Inc. its own name
named as the applicant on its applications, in US
0 granted
63 published
APA Optics, Inc. a former name
US, as the owner printed on each patent
15 granted
3 published
APA Enterprises, LLC a former name
US, as the owner printed on each patent
2 granted
1 published
Newest grantseach row opens the USPTO’s own copy
GrantedPatentTitleFieldOwner as printed
Nov 18, 202512,474,531Adapter dustcap with built-in cleanerOpticsClearfield, Inc.
Jul 1, 202512,345,940Aerial optical fiber distribution hubOpticsClearfield, Inc.
Jun 24, 202512,339,513Small form factor flatdrop pulling bulletOpticsClearfield, Inc.
Apr 29, 202512,287,519Flexible optical fiber connectors and assembliesOpticsClearfield, Inc.
Apr 29, 202512,287,516Dustcap with built-in cleanerOpticsClearfield, Inc.
Apr 1, 202512,265,271Gasket for a sealed optical fiber terminalOpticsClearfield, Inc.
Dec 10, 202412,164,167Modular pedestal distribution hubOpticsClearfield, Inc.
Nov 26, 202412,153,274Flexible cable mounting systemsOpticsClearfield, Inc.
Sep 17, 202412,092,885Optical fiber distribution systems and componentsOpticsClearfield, Inc.
Jun 11, 202412,007,609Dustcap with built-in cleanerOpticsClearfield, Inc.
Newest applications publishedan application is a clue, never a plan
PublishedApplicationTitleFieldOwner as printed
Jul 17, 20252025/0231352DUSTCAP WITH BUILT-IN CLEANEROpticsClearfield, Inc.
Feb 13, 20252025/0052972Modular Pedestal Distribution HubOpticsClearfield, Inc.
Feb 13, 20252025/0052956ADAPTER DUSTCAP WITH BUILT-IN CLEANEROpticsClearfield, Inc.
Dec 26, 20242024/0427101Optical Fiber Distribution Systems and ComponentsOpticsClearfield, Inc.
Nov 21, 20242024/0385409MODULAR VAULT FOR FIBER OPTIC CABLESOpticsClearfield, Inc.
Oct 17, 20242024/0345357SMALL FORM FACTOR FLATDROP PULLING BULLETOpticsClearfield, Inc. · patent 12,339,513 granted from it
Oct 17, 20242024/0345353MODULAR OPTICAL FIBER CASSETTEOpticsClearfield, Inc.
Oct 3, 20242024/0329331ADAPTER DUSTCAP WITH BUILT-IN CLEANEROpticsClearfield, Inc. · patent 12,474,531 granted from it
Aug 22, 20242024/0280777OPTICAL FIBER PEDESTAL BOXOpticsClearfield, Inc.
Aug 15, 20242024/0272373DUSTCAP WITH BUILT-IN CLEANEROpticsClearfield, Inc. · patent 12,287,516 granted from it
What it applied for, 2024 to 2025: Optics 12.

A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.

SI Assistanton CLFD · research, not advice