How Elias Howe Invented the Modern Lockstitch Sewing Machine
Elias Howe's 1846 patent for the lockstitch sewing machine, which used two separate threads to create a durable stitch that revolutionized garment manufacturing.
Original patent title: “Improvement in sewing-machines”
Elias Howe's 1846 patent for the lockstitch sewing machine, which used two separate threads to create a durable stitch that revolutionized garment manufacturing. Granted to Elias Howe in 1846 with 2 forward citations.
Key facts
Coverage
What does this patent actually cover?
The invention uses a needle with an eye at the point and a shuttle that carries a second thread. As the needle passes through the fabric, it creates a loop of thread. The shuttle then passes through this loop, locking the two threads together to form a secure stitch that does not unravel easily. This mechanism allows for rapid, automated sewing compared to traditional hand-stitching.
The gap
What does this patent NOT cover?
- Does not cover chain-stitch machines which use only a single thread.
- Does not cover electric motors, as this was a purely mechanical invention.
- Does not cover the concept of a needle itself, only the specific eye-pointed needle configuration used with a shuttle.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
By moving the eye of the needle to the point rather than the base, Howe allowed the needle to carry the thread through the fabric and create a loop for the shuttle to catch in one continuous motion.
The Patent Drawing
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Industrial sewing machines
Domestic sewing machines
Mass-produced apparel manufacturing
Why it matters
The bigger picture
This patent is the foundation of the modern garment industry. It shifted sewing from a slow, manual domestic task to an industrial process, enabling the mass production of clothing and significantly lowering the cost of apparel.
Granted
September 10, 1846
Market context
Who's building on this
Companies in this space
Modern manufacturers like Singer, Brother, and Juki continue to refine the basic lockstitch mechanism established by Howe. The fundamental principles of the shuttle and eye-pointed needle remain the standard for mechanical sewing today.
Market impact
This patent triggered a massive wave of industrialization in the textile sector, leading to the rise of the ready-to-wear clothing market. It also sparked significant legal battles over patent rights, defining early intellectual property standards in the United States.
Claim 1 — Plain English
What this patent covers
The invention uses a needle with an eye at the point and a shuttle that carries a second thread. As the needle passes through the fabric, it creates a loop of thread. The shuttle then passes through this loop, locking the two threads together to form a secure stitch that does not unravel easily. This mechanism allows for rapid, automated sewing compared to traditional hand-stitching.
The clever bit
By moving the eye of the needle to the point rather than the base, Howe allowed the needle to carry the thread through the fabric and create a loop for the shuttle to catch in one continuous motion.
What it does not cover
- Does not cover chain-stitch machines which use only a single thread.
- Does not cover electric motors, as this was a purely mechanical invention.
- Does not cover the concept of a needle itself, only the specific eye-pointed needle configuration used with a shuttle.
PatentBrief Score
Impact Score
Limited data
Citation count
10/40
Early citations
Claim breadth
0/20
Narrow claimsclaimsThe numbered statements at the end of a patent that legally define what the inventor owns.Read more →
Recency
0/20
Older than 20 years
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$2K – $8K
Midpoint $5K · expired or expiring · industry ×0.8
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
Concepts involved
Citations
Patent lineage
Cite this patent
(1846). How Elias Howe Invented the Modern Lockstitch Sewing Machine (U.S. Patent No. 4,750). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/4750/sewing-machine-howe
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does How Elias Howe Invented the Modern Lockstitch Sewing Machine cover?
Elias Howe's 1846 patent for the lockstitch sewing machine, which used two separate threads to create a durable stitch that revolutionized garment manufacturing.
Who owns patent US 4750?
Elias Howe owns this patent, granted in 1846.
When does this patent expire?
This patent has expired and is now in the public domain — anyone can use the invention freely.
What is patent US 4750 cited by?
This patent has been cited by 2 later patents that build on its ideas.
What problem does this patent solve?
This patent is the foundation of the modern garment industry. It shifted sewing from a slow, manual domestic task to an industrial process, enabling the mass production of clothing and significantly lowering the cost of apparel.
What does this patent NOT cover?
Does not cover chain-stitch machines which use only a single thread.
Patent monitoring