A writing instrument for alternating between a active stylus tip and an ink pen tip which is retractable from and displaceable through an annular opening at one end of the writing instrument is disclosed.

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

A sanitary sleeve comprising a body configured to be grasped by a hand of a user, the body extending from a first end toward a second end along an axis, the body including a plurality of layers configured to be removed one at a time, and the plurality of layers including at least a first layer and a second layer, and wherein removal of the first layer of the plurality of layers exposes the second layer of the plurality of layers.

A sanitary sleeve comprising a body configured to be grasped by a hand of a user, the body extending from a first end toward a second end along an axis, the body including a plurality of layers configured to be removed one at a time, and the plurality of layers including at least a first layer and a second layer, and wherein removal of the first layer of the plurality of layers exposes the second layer of the plurality of layers.

A writing system that includes a reusable notebook including a sheet having a working surface. The working surface includes a printed code and an operative control. The writing system includes a writing instrument configured to capture images of the printed code and a computing device configured to communicate with the reusable notebook and/or the writing instrument. The sheet includes a surface coating over the working surface configured so that a writing material of the writing instrument can be removed by applying a dry ancillary device.

A multifunction pen is provided including a refill for a writing implement such as a ballpoint pen on a tip end side and including an electromagnetic induction-based electromagnetic induction refill on a rear end side such that there is no need to perform a switching operation between the writing refill and the electromagnetic induction refill. The multifunction pen includes a shaft tube 10 including openings at both of a tip end and a rear end, a writing refill 40 that is housed inside the shaft tube 10 and that includes a writing tip exposed through the opening at the tip end, and an electromagnetic induction refill 50 that is housed inside the shaft tube 10, that is exposed through the opening at the rear end, and that is employed in electromagnetic induction-based input.

A multifunction pen is provided including a refill for a writing implement such as a ballpoint pen on a tip end side and including an electromagnetic induction-based electromagnetic induction refill on a rear end side such that there is no need to perform a switching operation between the writing refill and the electromagnetic induction refill. The multifunction pen includes a shaft tube 10 including openings at both of a tip end and a rear end, a writing refill 40 that is housed inside the shaft tube 10 and that includes a writing tip exposed through the opening at the tip end, and an electromagnetic induction refill 50 that is housed inside the shaft tube 10, that is exposed through the opening at the rear end, and that is employed in electromagnetic induction-based input.

Provided is an electronic pen with a cylindrical housing including an opening at an end portion of the housing on a pen tip side of the housing, a cylindrical member disposed in the housing and fixed to the housing at a part on the pen tip side of the housing, and a core body formed in a rod shape by a material containing a pigment, the core body including a body portion inserted into the cylindrical member through the opening of the housing and a pull-out portion configured to enable the core body to be pulled out of the housing. A diameter of the body portion of the core body inserted into the cylindrical member is larger than a difference between an outer diameter of the cylindrical member and an inner diameter of the cylindrical member.

Provided is an electronic pen with a cylindrical housing including an opening at an end portion of the housing on a pen tip side of the housing, a cylindrical member disposed in the housing and fixed to the housing at a part on the pen tip side of the housing, and a core body formed in a rod shape by a material containing a pigment, the core body including a body portion inserted into the cylindrical member through the opening of the housing and a pull-out portion configured to enable the core body to be pulled out of the housing. A diameter of the body portion of the core body inserted into the cylindrical member is larger than a difference between an outer diameter of the cylindrical member and an inner diameter of the cylindrical member.