The FTC announced Monday that it has asked cellphone makers to report on their security-patch practices.  This is just the FTC's latest reminder to tech companies that it expects them to take continuing responsibility for the security of their products long after their products have shipped.  In just the past few months, the FTC has also taken action against Oracle for failing to ensure that Java was properly patched on users' computers, and against Asus for failing to ensure security updates on its wireless routers.