USPTO 2015–2025 USPTO PatentsView Foreign Corporation

AAC Microtech (changzhou) Co., Ltd.

USPTO PatentsView assignee record - 236 granted patents across 34 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H04R (LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

236

Total patents granted

CPC technology areas

9.0

Avg claims per patent

+1188%

5-year filing velocity

The verdict

AAC holds 236 US patents across 34 technology areas, rank #1,728 of 50,000 tracked assignees.

#1,728
of 50,000 US assignees by volume: Top 1%
by Innovation Score (64.9/100): 9.0
avg claims per patent: +1188%
filing velocity, last 5 yrs

Portfolio overview

AAC Microtech (changzhou) Co., Ltd. has been granted 236 US utility patents between 2015 and 2025, placing AAC Microtech (changzhou) Co., Ltd. at rank #1,728 across all assignees tracked by PlainPatent. This portfolio spans 34 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.0 claims per patent with primary concentration in H04R (LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS). As a Foreign Corporation, AAC Microtech (changzhou) Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, AAC sits between Sicpa Holding Sa (237 patents, rank #1,724) and Meidensha Corporation (236 patents, rank #1,732) - the closest US assignees by grant volume. The composite Innovation Score of 64.9/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 219 grants, compared with 17 in the 2015–2019 window, a +1188% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. AAC Microtech (changzhou) Co., Ltd.'s 9.0 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 34 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark AAC Microtech (changzhou) Co., Ltd. against peers pursuing similar technology classes.

Sicpa Holding

237
Sartorius Stedim…

237
Tsubakimoto Chain

237
University of Lou…

237
ALPS Electric

236
Beijing Zhigu RUI…

236
Johnson & Johnson…

236
Meidensha

236
AAC Microtech (Ch… ◀

236

What this shows AAC holds 236 patents at rank #1,728, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near AAC

By rank, the assignees closest to #1,728 in granted patent volume.

Leaders in H04R (Loudspeakers)

Other assignees with the most granted patents in AAC's primary technology class.

AAC's Innovation Score vs. every tracked assignee

Composite of portfolio volume, filing velocity, technology breadth, and claim depth (0–100)

65 Top 1% higher than 99% of 50,000 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

AAC Microtech (changzhou) Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	6	2.5%
2016	5	2.1%
2017	1	0.4%
2018	1	0.4%
2019	4	1.7%
2021	2	0.8%
2022	5	2.1%
2023	60	25.4%
2024	76	32.2%
2025	76	32.2%

Which technologies does AAC Microtech (changzhou) Co., Ltd. patent most?

H04R - LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS 192

H02K - DYNAMO-ELECTRIC MACHINES 25

H05K - PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 8

H10K - ORGANIC ELECTRIC SOLID-STATE DEVICES 6

C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE 5

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 5

C07F - ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM 5

G06F - ELECTRIC DIGITAL DATA PROCESSING 5

B06B - METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, ; e.g.; FOR PERFORMING MECHANICAL WORK IN GENERAL 4

G05G - CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY 4

H04S - STEREOPHONIC SYSTEMS 4

H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 4

G10K - SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR 3

C07D - HETEROCYCLIC COMPOUNDS 3

F16M - FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS 2

Top 15 of 34 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Accelerating

Where it ranks

Overall rank by patents

#1,728

Across all tracked assignees

Innovation Score

64.9 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does AAC Microtech (changzhou) Co., Ltd. hold?

AAC Microtech (changzhou) Co., Ltd. holds 236 US granted patents filed between 2015 and 2025, spanning 34 technology areas.

What is AAC Microtech (changzhou) Co., Ltd.'s Innovation Score?

AAC Microtech (changzhou) Co., Ltd. has an Innovation Score of 64.9 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does AAC Microtech (changzhou) Co., Ltd. focus on?

AAC Microtech (changzhou) Co., Ltd.'s top technology area is H04R (LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS) with 192 patents. The company has filed patents in 34 CPC subclasses total.

Is AAC Microtech (changzhou) Co., Ltd.'s patent filing rate increasing or decreasing?

AAC Microtech (changzhou) Co., Ltd.'s recent filing velocity is +1188% compared to the prior five-year period. This indicates accelerating innovation.

What does claim depth mean for AAC Microtech (changzhou) Co., Ltd.'s patents?

AAC Microtech (changzhou) Co., Ltd.'s patents average 9.0 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the AAC Microtech (changzhou) Co., Ltd. patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

How to use this portfolio

AAC's 236 grants land it in the top 1% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - AAC ranks #1,728 of 50,000. Top 50 holders
Most of this portfolio concentrates in H04R - see who else leads that technology area. H04R leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.