Where does Em-tech Co., Ltd rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Em-tech Co., Ltd ranks #5,835 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Em-tech Co., Ltd hold?

Em-tech Co., Ltd holds 58 US utility patents granted between 2015 and 2025, spanning 24 technology areas.

What is Em-tech Co., Ltd's Innovation Score?

Em-tech Co., Ltd has an Innovation Score of 44.6 out of 100 (top 25% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Em-tech Co., Ltd's patent grant rate increasing or decreasing?

Em-tech Co., Ltd's recent grant velocity is +74% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Em-tech Co., Ltd's patents?

Em-tech Co., Ltd's patents average 9.8 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the Em-tech 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Em-tech Co., Ltd

Q: What technology areas does Em-tech Co., Ltd focus on?

Em-tech 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 49 patents, ranking #71 of 1,513 assignees active in that subclass. Grants appear in 24 CPC subclasses total.

USPTO PatentsView assignee record - 58 granted patents across 24 technology areas, recorded in grant years 2015–2025. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: H04R (Loudspeakers, Microphones, Gramophone Pick-ups OR Like Acoustic Electromechanical TRANSDUCERS; Deaf-aid SETS; Public Address Systems).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Em-tech ranks #5,835 of 49,997 tracked US assignees by granted-patent volume, with 58 patents across 24 technology areas.

#5,835
of 49,997 US assignees by volume: Top 25%
by Innovation Score (44.6/100): 9.8
avg claims per patent: +74%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R5835 · Foreign Corporation #5,835 · 58 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 58 grants
UPPER-Q #5,835/49,997
PHOTO-FINISH Contec
CPC-FOCUS H04R · 24 areas
INNOV-PAR 44.6/100
CLAIMS-PAR 9.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +74% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Contec, LLC (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Em-tech’s 44.6 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 14.1 pts (32%) Velocity 7.4 pts (17%) Breadth 17.3 pts (39%) Claim depth 5.9 pts (13%)

Qualcomm Incorporated · highest

85
Em-tech · this assignee

45
GE Hybrid · near

45
Hexagon Technology AS · near

45
OCI · near

45
Therma-stor · near

45
3D Lighting… · lowest

7

What this shows Em-tech's Innovation Score is 44.6/100 (top 25% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Em-tech?

Each dot is one of Em-tech’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Em-tech’s own 9.8 claims/patent is at or below the 13.0 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

Em-tech vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Em-tech's grants concentrate

Em-tech Co., Ltd is a focused PatentsView assignee: 24 CPC subclasses with 84.5% of grants classified under H04R (Loudspeakers, Microphones, Gramophone Pick-ups OR Like Acoustic Electromechanical TRANSDUCERS; Deaf-aid SETS; Public Address Systems). Peak complete grant year is 2022 (14 grants) versus a trough of 2 in 2016. By volume, Em-tech sits between Contec, LLC and Flashbay Electronics Hong Kong Limited.

Em-tech's three-year grant acceleration

Em-tech Co., Ltd shows 21 grants in 2022–2024 against only 19 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Contec

58
Dfine

58
Dongbu Hitek

58
Duquesne Universi…

58
Echostar UK Holdi…

58
Engineered Contro…

58
Fuerst Group

58
Flashbay Hong Kong

58
Em-tech ◀

58

What this shows Em-tech holds 58 patents at rank #5,834, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Em-tech

By rank, the assignees closest to #5,834 in granted patent volume.

Leaders in H04R (Loudspeakers)

Other assignees with the most granted patents in Em-tech's primary technology class.

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Em-tech, neither rank-band nor same-CPC leaders (those blocks stay above). In H04R (Loudspeakers), Em-tech ranks #71 of 1,513 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (45 here).

Therma-stor LLC 45 GE Hybrid Technologies, LLC 45 Hexagon Technology AS 45 OCI Company Ltd. 45

Similar claim depth

Nearest assignees by average claims per patent (9.8 here).

Daishinku Corporation 9.8 avg Asahi Intecc Co., Ltd. 9.8 avg Samsung Heavy IND. Co., Ltd. 9.8 avg CLO Virtual Fashion Inc. 9.8 avg

Em-tech's Innovation Score vs. every tracked assignee

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

45 Top 25% higher than 75% of 49,997 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

Em-tech Co., Ltd patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	6	10.3%
2016	2	3.4%
2017	2	3.4%
2018	2	3.4%
2019	7	12.1%
2020	4	6.9%
2021	8	13.8%
2022	14	24.1%
2023	4	6.9%
2024	3	5.2%
2025partial year	6	10.3%

Which technologies does Em-tech Co., Ltd patent most?

H04R - Loudspeakers, Microphones, Gramophone Pick-ups OR Like Acoustic Electromechanical TRANSDUCERS; Deaf-aid SETS; Public Address Systems 49

H02K - Dynamo-electric Machines 4

H10N - Electric Solid-state Devices NOT Otherwise Provided FOR 4

B06B - Methods OR Apparatus FOR Generating OR Transmitting Mechanical Vibrations OF Infrasonic, Sonic, OR Ultrasonic Frequency, ; e.g.; FOR Performing Mechanical Work IN General 3

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 2

H05K - Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components 2

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; Selection OF Materials FOR Their Magnetic Properties 2

F02K - Jet-propulsion Plants 2

B64D - Equipment FOR Fitting IN OR TO AIRCRAFT; Flight SUITS; PARACHUTES; Arrangement OR Mounting OF Power Plants OR Propulsion Transmissions IN Aircraft 2

G10L - Speech Analysis Techniques OR Speech SYNTHESIS; Speech RECOGNITION; Speech OR Voice Processing TECHNIQUES; Speech OR Audio Coding OR Decoding 2

C07D - Heterocyclic Compounds 1

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 1

A61B - DIAGNOSIS; SURGERY; Identification 1

A61N - ELECTROTHERAPY; MAGNETOTHERAPY; Radiation THERAPY; Ultrasound Therapy 1

H02N - Electric Machines NOT Otherwise Provided FOR 1

Top 15 of 24 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Em-tech Co., Ltd's patent record in context - here's where to go next.

Em-tech Co., Ltd's lead technology class is H04R (Loudspeakers, Microphones, Gramophone Pick-ups OR Like Acoustic Electromechanical TRANSDUCERS; Deaf-aid SETS; Public Address Systems), 84.5% of its portfolio - see every assignee active in that class. Explore H04R
Ranked #5,835 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Em-tech Co., Ltd against Contec, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 44.6/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

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

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 by PlainPatent, US Patent Intelligence Editorial Process · 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.