A subsequent patent renewal in 1849, and aggressive litigation against infringements, gave Colt a domestic monopoly on revolver development until the middle 1850s.

The theatre and a patent renewal were purchased by actor David Garrick (who had trained under Macklin earlier) and partner James Lacy.

The structure of patent renewal fees might be adjusted to encourage patentees to assess more carefully the value of maintaining lower value patents, so reducing the density of patent thickets."

Focusing on public companies, Bessen and Meurer use several sources-including the results of patent auctions, the rate of patent renewals, and the effect of patent portfolios on market capitalizations-to determine the value of public firms' patent portfolios.