23,557 research outputs found

    The Dynamics of the Transfer and Renewal of Patents

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    This paper explores a new dataset of transfers of patents recorded at the United States Patent and Trademark Office. The aim of the paper is twofold. First, a number of patterns are presented. For instance, the probability of a patent being traded monotonically decreases as a function of its age except at the renewal dates. Immediately after renewal, this probability discontinuously increases. Among patents of the same age, the probability of being traded and the probability of being renewed is increasing in the total number of citations received. Moreover, previously traded patents, and especially the recently traded, are more likely to be traded and less likely to be allowed to expire than patents not previously traded. Second, the paper extends Pakes and Schankerman\\'s patent renewal framework in order to develop a model of the transfer and renewal of patents. Two new key features of the model are motivated by the patterns documented: gains from reallocating patents to more productive firms and costs of adopting technology.Markets for Technology; Patents; Transfer of Patents

    A 3D Printed Toolbox for Opto-Mechanical Components

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    Nowadays is very common to find headlines in the media where it is stated that 3D printing is a technology called to change our lives in the near future. For many authors, we are living in times of a third industrial revolution. Howerver, we are currently in a stage of development where the use of 3D printing is advantageous over other manufacturing technologies only in rare scenarios. Fortunately, scientific research is one of them. Here we present the development of a set of opto-mechanical components that can be built easily using a 3D printer based on Fused Filament Fabrication (FFF) and parts that can be found on any hardware store. The components of the set presented here are highly customizable, low-cost, require a short time to be fabricated and offer a performance that compares favorably with respect to low-end commercial alternatives.Comment: 9 pages, 9 figure

    How redeployable are patent assets? Evidence from failed startups

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    Entrepreneurial firms are important sources of patented inventions. Yet little is known about what happens to patents "released" to the market when startups fail. This study provides a first look at the frequency and speed with which patents originating from failed startups are redeployed to new owners, and whether the value of patents is tied to the original venture and team. The evidence is based on 1,766 U.S. patents issued to 285 venture capital-backed startups that disband between 1988 and 2008 in three innovation-intensive sectors: medical devices, semiconductors, and software. At odds with the view that the resale market for patented inventions is illiquid, we find that most patents from these startups are sold, are sold quickly, and remain "alive" through renewal fee payment long after the startups are shuttered. The patents tend to be purchased by other operating companies in the same sector, and retain value beyond the original venture and team. We do find, however, that the patents and people sometimes move jointly to a new organization following the dissolution of the original venture, and explore the conditions under which such co-movement is more likely. The study provides new evidence on a phenomenon-of active markets for buying and selling patents-underexplored in the strategy literature and consequential for both entrepreneurial and established firms.Accepted manuscrip

    A distributional checklist of the leaf-cutting bees (Hymenoptera: Megachilidae) of Florida

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    The leaf-cutting bees are a diverse group which is commonly encountered all across the country. With over 600 North American species, most of which are in the genera Anthidium, Dianthidium, Stelis, Heriades, Hoplitis, Osmia, Megachile and Coelioxys, there are numerous “non-Apis” pollinators. Being an important taxon, there is a definite need for an awareness of their distribution across the United States and, perhaps in time, everywhere. This may allow us to follow the establishment of exotic species such as Megachile [Callomegachile] torrida Smith, M. [Pseudomegachile] lanata Fabricius, and an unidentified exotic which is listed below in the subgenus Callomegachile
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