Where does Mainstream Engineering Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Mainstream Engineering Corporation ranks #3,930 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 Mainstream Engineering Corporation hold?

Mainstream Engineering Corporation holds 92 US utility patents granted between 2015 and 2025, spanning 75 technology areas.

What is Mainstream Engineering Corporation's Innovation Score?

Mainstream Engineering Corporation has an Innovation Score of 57.2 out of 100 (top 5% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Mainstream Engineering Corporation focus on?

Mainstream Engineering Corporation's top technology area is F24F (AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR Currents FOR Screening) with 24 patents, ranking #41 of 885 assignees active in that subclass. Grants appear in 75 CPC subclasses total.

Is Mainstream Engineering Corporation's patent grant rate increasing or decreasing?

Mainstream Engineering Corporation's recent grant velocity is +104% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Mainstream Engineering Corporation's patents?

Mainstream Engineering Corporation's patents average 10.2 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 Mainstream Engineering Corporation 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 US Corporation

Mainstream Engineering Corporation

USPTO PatentsView assignee record - 92 granted patents across 75 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: F24F (AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR Currents FOR Screening).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Mainstream ranks #3,930 of 49,997 tracked US assignees by granted-patent volume, with 92 patents across 75 technology areas.

#3,930
of 49,997 US assignees by volume: Top 5%
by Innovation Score (57.2/100): 10.2
avg claims per patent: +104%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R3930 · US Corporation #3,930 · 92 grants

GRANTS-SMALL · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-PAR · TYPE-USCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 92 grants
TOP-DECILE #3,930/49,997
PHOTO-FINISH LAT Enterprises
CPC-WIDE F24F · 75 areas
INNOV-PAR 57.2/100
CLAIMS-PAR 10.2 claims/avg
TYPE-USCORP US Corporation
VEL-SURGE +104% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: LAT Enterprises, Inc. (±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 Mainstream’s 57.2 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 15.7 pts (27%) Velocity 10.4 pts (18%) Breadth 25.0 pts (44%) Claim depth 6.1 pts (11%)

Qualcomm Incorporated · highest

85
AGC Flat Glass… · near

57
Beijing Huamei · near

57
Idexx Laboratories · near

57
Leica Biosystems… · near

57
Mainstream Engineering · this assignee

57
3D Lighting… · lowest

7

What this shows Mainstream's Innovation Score is 57.2/100 (top 5% 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 Mainstream?

Each dot is one of Mainstream’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). Mainstream’s own 10.2 claims/patent is at or below the 17.9 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

How Mainstream's grant cadence moved

Between 2020–2024, Mainstream Engineering Corporation received 57 grants versus 28 in 2015–2019 (+104% equal-window velocity, above median growth). Across complete PatentsView years, output peaked in 2022 at 16 grants and bottomed in 2017 at 3. Lead class F24F accounts for 26.1% of the portfolio across 75 subclasses. Volume neighbours: LAT Enterprises, Inc. (#3,926) and MorphoTrust USA, LLC (#3,934).

Mainstream's three-year grant acceleration

From 2019–2021 to 2022–2024, Mainstream Engineering Corporation moved from 25 to 39 grants (1.56x the prior three-year total, a multiple, not a CAGR). See the growth leaderboard.

LAT Enterprises

92
Lippert Components

92
Lindsay

92
Liqid

92
Master Lock

92
Microvision

92
Mongodb

92
Morphotrust USA

92
Mainstream Engine… ◀

92

What this shows Mainstream holds 92 patents at rank #3,930, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Mainstream

By rank, the assignees closest to #3,930 in granted patent volume.

Leaders in F24F (Air-conditioning)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Mainstream, neither rank-band nor same-CPC leaders (those blocks stay above). In F24F (Air-conditioning), Mainstream ranks #41 of 885 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (57 here).

Idexx Laboratories Inc. 57 AGC Flat Glass North America, Inc. 57 Leica Biosystems Nussloch GmbH 57 Beijing Huamei, Inc. 57

Similar claim depth

Nearest assignees by average claims per patent (10.2 here).

Mitsubishi Power, Ltd. 10.2 avg Ellenberger & Poensgen GmbH 10.2 avg Hitachi Kokusai Electric Inc. 10.2 avg Shinko Electric Industries Co., Ltd. 10.2 avg

Mainstream's Innovation Score vs. every tracked assignee

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

57 Top 5% higher than 95% 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

Mainstream Engineering Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	5	5.4%
2016	7	7.6%
2017	3	3.3%
2018	6	6.5%
2019	7	7.6%
2020	11	12.0%
2021	7	7.6%
2022	16	17.4%
2023	10	10.9%
2024	13	14.1%
2025partial year	7	7.6%

Which technologies does Mainstream Engineering Corporation patent most?

F24F - AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR Currents FOR Screening 24

F25B - Refrigeration Machines, Plants OR SYSTEMS; Combined Heating AND Refrigeration SYSTEMS; Heat Pump Systems 23

F28F - Details OF Heat-exchange AND Heat-transfer Apparatus, OF General Application 14

C30B - Single-crystal Growth ; Unidirectional Solidification OF Eutectic Material OR Unidirectional Demixing OF Eutectoid MATERIAL; Refining BY Zone-melting OF Material ; Production OF A Homogeneous Polycrystalline Material With Defined Structure ; Single Crystals OR Homogeneous Polycrystalline Material WI 11

F28D - Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact 10

C23C - Coating Metallic MATERIAL; Coating Material With Metallic MATERIAL; Surface Treatment OF Metallic Material BY Diffusion Into THE Surface, BY Chemical Conversion OR SUBSTITUTION; Coating BY Vacuum Evaporation, BY Sputtering, BY ION Implantation OR BY Chemical Vapour Deposition, IN General 10

F16M - Frames, Casings OR Beds OF Engines, Machines OR Apparatus, NOT Specific TO Engines, Machines OR Apparatus Provided FOR ELSEWHERE; STANDS; Supports 9

F42B - Explosive Charges, e.g. FOR Blasting, Fireworks, Ammunition 9

B64C - AEROPLANES; Helicopters 9

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 7

H10N - Electric Solid-state Devices NOT Otherwise Provided FOR 7

H10F - Inorganic Semiconductor Devices Sensitive TO Infrared Radiation, Light, Electromagnetic Radiation OF Shorter Wavelength OR Corpuscular Radiation 7

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 7

H01L - Semiconductor Devices NOT Covered BY Class H10 6

H01J - Electric Discharge Tubes OR Discharge Lamps 6

Top 15 of 75 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

Mainstream Engineering Corporation's patent record in context - here's where to go next.

Mainstream Engineering Corporation's lead technology class is F24F (AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR Currents FOR Screening), 26.1% of its portfolio - see every assignee active in that class. Explore F24F
Ranked #3,930 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Mainstream Engineering Corporation against LAT Enterprises, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 57.2/100 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.