Abstract: A window (26) is masked accurately by placing the side (44) of a tape roll (42) against a window frame (28) and pressing the outer rim (46) of the tape roll (42) against the window (26). Pressure bonds the adhesive (22a) to the window (26). The side (44) of the tape roll (42) is guided and supported against the window frame (28) and tape (100) is simultaneously unwound against the window (26). The outer longitudinal periphery of the tape (100) accurately follows the corner (36).

Abstract: A tape applicator suitable for applying a tape having a pressure sensitive adhesive layer facing outside of the center of a tape roll having an inner core and an outer core. The inner core is rotably mounted inside of an outer core. The inner core has an handle to hold the applicator in hand. The tape applicator is secured inside of a core of a tape roll.

Abstract: A computer assisted method, comprising steps of having a geographic location information, at least one demand parameter and a demand area definition parameter derived from a multiplicity of demand client computers. Storing said geographic location information, said demand parameters and said demand area definition parameter on a host server. Having a geographic location information, at least one supply parameter and a supply area definition parameter derived from a multiplicity of supply client computers.

Abstract: A portable communication and audio system includes a radio telephone for receiving a first audio signal and transmitting a corresponding first radio signal through a transmitter to another location, and for receiving a second radio signal through a receiver and converting it to a second audio signal. An audio device provides a third audio signal. A microphone receives the first audio signal. A headset with first and second speakers is provided for selectively listening to the second or the third audio signal. A user-operated switch selectively disables the first speaker in a first state or the microphone in a second state. A state-indicating apparatus produces a signal indicating the state of the user-operated switch.