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Lyon & Lyon

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A former Los Angeles–based law firm specializing in domestic and international intellectual property law.

Last updated August 25, 2026

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Overview

Lyon & Lyon was a Los Angeles–based law firm focused on intellectual property law in the United States and internationally. Its history began in 1901, when Frederick Saxton Lyon started practicing patent law in Los Angeles. The firm adopted the Lyon & Lyon name in 1919 after Frederick's son, Leonard, joined him as a partner, creating the family identity under which the practice became known. Over the course of the twentieth century, Lyon & Lyon developed into one of the largest and oldest intellectual property firms in the United States. Its work covered the principal forms of intellectual property protection and enforcement, including patents, trademarks, copyrights, and trade secrets. The firm advised clients on both domestic and international patent and trademark prosecution, licensing, and litigation. Its technical coverage extended across the major areas of technology represented in its client work, allowing it to serve inventors as well as major commercial enterprises. At its peak, the firm employed more than 100 patent lawyers across six offices located in California, New York City, and Washington, D.C. It also maintained relationships with intellectual property firms in many parts of the world, supporting cross-border portfolio management and international filings. Its client base reportedly ranged from individual inventors to multinational companies, and included Disney, Honda, Gucci, K-Mart, Taco Bell, and Mitsubishi. The firm was associated with a substantial body of intellectual property work. Among the notable patents prepared by Lyon & Lyon was Philo T. Farnsworth's patent relating to electronic television. The firm's broader record included thousands of patent, trademark, and copyright registrations, together with a strong record in both jury and non-jury trials. Lyon & Lyon ultimately ceased operations after filing for bankruptcy in 2002. The bankruptcy and dissolution ended the firm's independent existence after more than a century of practice. Because the available reference material does not provide detailed information about the bankruptcy proceedings, individual office closures, successor practices, or the firm's final leadership, those aspects remain undocumented here.

History

Lyon & Lyon originated in Los Angeles in 1901, when Frederick Saxton Lyon began practicing patent law. The firm's early identity was therefore rooted in the rapidly developing field of patent protection rather than in general legal practice. In 1919, Frederick's son Leonard became his partner, and the practice took the Lyon & Lyon name. This partnership established the family designation that remained associated with the firm throughout its later growth. During the twentieth century, Lyon & Lyon expanded from its original patent-law base into a broad intellectual property practice. Its areas of work included patents, trademarks, copyrights, and trade secrets. The firm handled both the acquisition and enforcement of intellectual property rights, advising on domestic and international prosecution, licensing, and litigation. Its matters covered the principal areas of technology represented in its client base, and its services were available to individual inventors as well as large corporate organizations. The firm became one of the largest and oldest intellectual property law practices in the United States. At its height, it had more than 100 patent lawyers working from six offices in California, New York City, and Washington, D.C. Its international reach was supported by long-standing relationships with intellectual property firms in jurisdictions around the world. Those relationships enabled the firm to assist with international portfolios in addition to its United States work. Lyon & Lyon's reported clients included Disney, Honda, Gucci, K-Mart, Taco Bell, and Mitsubishi. The firm also represented individual inventors and was associated with a large volume of registrations and disputes. Its work included thousands of patents, trademark registrations, and copyright registrations. One specifically noted matter was the preparation of Philo T. Farnsworth's patent concerning electronic television. The firm also developed a strong reported record in jury and non-jury trials, reinforcing its reputation as both a prosecution and litigation practice. The firm's history ended in 2002, when Lyon & Lyon filed for bankruptcy and dissolved. The available source material does not describe the causes of the bankruptcy, the administration of the proceeding, or the disposition of client matters and personnel. It likewise does not identify a successor organization. Accordingly, Lyon & Lyon is best characterized as a historically significant but defunct American intellectual property law firm whose century-long practice ended with dissolution in 2002.

  • 2002

    Bankruptcy and dissolution

    [1]

    Lyon & Lyon filed for bankruptcy and dissolved after more than a century of practice.

  • 1919

    The Lyon & Lyon name is adopted

    [1]

    Frederick's son, Leonard, joined him as a partner, and the firm acquired the Lyon & Lyon name.

  • 1901

    Frederick Saxton Lyon begins patent practice

    [1]

    Frederick Saxton Lyon began practicing patent law in Los Angeles, establishing the practice that later became Lyon & Lyon.

Products and positioning

A large, established intellectual property law firm serving both individual inventors and multinational corporations, with capabilities spanning prosecution, licensing, litigation, and international portfolio work.

  • Intellectual property legal services

    Patent prosecution

    Preparation and prosecution of patent applications for domestic and international protection. The firm's work covered technology-related inventions and included representation of both individual inventors and corporate patent holders.

  • Intellectual property legal services

    Trademark and copyright services

    Counseling and registration work involving trademarks and copyrights, together with enforcement and dispute services. The firm's reported practice included thousands of trademark and copyright registrations.

  • Legal litigation services

    Intellectual property litigation

    Representation in patent, trademark, copyright, and trade-secret disputes, including jury and non-jury trials. Litigation was one of the firm's principal capabilities alongside prosecution and licensing.

  • Intellectual property transactions

    Licensing and international portfolio services

    Legal advice concerning intellectual property licensing and the management of domestic and international rights portfolios. The firm's relationships with intellectual property practices around the world supported cross-border work.

Brand decisions

  • 2002

    Bankruptcy filing and dissolutionOther

    Background

    After operating for more than a century as an intellectual property law firm, Lyon & Lyon entered bankruptcy proceedings in 2002.

    Action taken

    The firm filed for bankruptcy and dissolved.

    Aftermath

    The filing ended Lyon & Lyon's independent operations. Available reference material does not specify the treatment of client matters, offices, personnel, or any successor practice.

Recent events

  • 2002

    Lyon & Lyon files for bankruptcy and dissolves[1]

    Bankruptcy

    Lyon & Lyon LLP filed for bankruptcy and dissolved, ending the operations of the long-established intellectual property law firm.

Sources1 sources

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