You can freely build on How Mary Phelps Jacob Invented the Modern Backless Brassiere
This patent expired in 1934. Every claim — 0 independent, 0 dependent — is now unenforceable. Anyone can use, reproduce, manufacture, sell, or offer for sale this technology without a license.
Original assignee
MARY P JACOB
Patent granted
1914
Expired
1934
Forward citations
3
What this patent covers
The invention provides a lightweight garment for supporting the breasts using two silk handkerchiefs and ribbon straps. It replaces the rigid, whalebone-stiffened corsets common in the early 20th century. The design allows for a more natural silhouette and greater freedom of movement by using soft materials that conform to the body rather than forcing the body into a rigid shape.
What is now free to use
All 0 claims of US 1115674 are in the public domain. Specifically:
The 0 dependent claims add narrowing limitations and are also free.
What is NOT covered
Patent expiry frees this specific invention. Separately-patented improvements made after expiry may still be protected.
Does not cover modern underwire construction techniques.
Does not cover elastic synthetic fabrics like spandex or elastane.
Does not cover molded cup designs or foam padding.
Who is building on this today
The foundation laid by this patent evolved into the global intimate apparel industry, now dominated by companies like HanesBrands and Victoria's Secret. These companies continue to iterate on the basic concept of soft, supportive undergarments.
Products built on expired version of this technology
Early 20th-century soft-cup brassieres
Handkerchief-style bralettes
How to cite this patent in your documentation
MARY P JACOB. US Patent 1115674. Brassiere.. Granted 1914, expired 1934. Now in the public domain.
Note: This is a convenience citation. Consult a patent attorney for formal freedom-to-operate analysis.
PatentBrief is an educational resource and does not provide legal advice. Patent expiration information is derived from USPTO records and may not reflect continuation patents, divisional filings, or separately-patented improvements. For commercial use or production decisions, obtain a formal freedom-to-operate (FTO) opinion from a registered patent attorney.