In its 90 years as an attraction on San Francisco’s Telegraph Hill, Coit Tower is only now trending with the stair-climbing set, thanks largely to an 18-month shutdown of the elevator ...

But for the last month and a half, Hughes hasn't been able to use one of the very selling points for her condo.

His design, called the “revolving stairs,” was quite ... in a 1950 case Haughton Elevator Co. v. Seeberger where the court confirmed that escalator had become a generic descriptive word.