Curtis v. Land

This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the decision of the Examiner of Interferences awarding priority of invention of the subject matter’ defined by the counts in issue (Nos. 1, 2, and 3) to appellee, Edwin H. Land.

The invention relates to electric signal devices, particularly railway traffic signal devices.

Count 3 is illustrative of the involved counts. It reads:

3. A signal device including a housing, a signal lamp within the housing, and. means for suppressing phantom signals, said means being positioned to intercept light…