A writing pen includes at least one processor, a fingerprint acquiring device, and an information generating device. The fingerprint acquiring device is arranged on a surface of the pen, the information generating device is arranged within the writing pen. Magnetic ink is in the writing pen. The fingerprint acquiring device takes a fingerprint when the user grips the writing pen, the processor acquires the fingerprint information and generates an electric signal reflecting the fingerprint information. The signal is transmitted to the information generating device, the information generating device imparts the fingerprint information to the magnetic ink, thus handwriting written by the writing pen with the magnetic ink records the fingerprint information of the user.

A writing pen includes at least one processor, a fingerprint acquiring device, and an information generating device. The fingerprint acquiring device is arranged on a surface of the pen, the information generating device is arranged within the writing pen. Magnetic ink is in the writing pen. The fingerprint acquiring device takes a fingerprint when the user grips the writing pen, the processor acquires the fingerprint information and generates an electric signal reflecting the fingerprint information. The signal is transmitted to the information generating device, the information generating device imparts the fingerprint information to the magnetic ink, thus handwriting written by the writing pen with the magnetic ink records the fingerprint information of the user.

A dry-erase marker comprising a cylindrical housing configured to store an ink and a conic housing coupled to the cylindrical housing on a first end and having a socket on a second end. The dry-erase marker further comprising a marker head contained in the socket of the conic housing, where the marker head comprises a polymeric material and a surface topology. The conic housing is configured to transfer the ink from the cylindrical housing to the marker head, and the marker head is configured to transfer the ink to a dry-erase board by rotating in the socket.

A dry-erase marker comprising a cylindrical housing configured to store an ink and a conic housing coupled to the cylindrical housing on a first end and having a socket on a second end. The dry-erase marker further comprising a marker head contained in the socket of the conic housing, where the marker head comprises a polymeric material and a surface topology. The conic housing is configured to transfer the ink from the cylindrical housing to the marker head, and the marker head is configured to transfer the ink to a dry-erase board by rotating in the socket.

A ballpoint pen is provided in which the width of the drawing line can be changed, wherein responsiveness can be improved when distinguishing between drawing thin lines and thick lines. A ballpoint pen 1 provided at the pen tip side with a first writing part having a writing ball 25, wherein the ballpoint pen 1 is characterized by being provided with a writing part at the pen tip side with which it is possible to write a thicker line than the line written with the first writing part, only the first writing part being used when the writing weight is 1 g and the writing angle is 90, and the second writing part being used when the writing weight is 200 g, and the writing angle is 40-90.

A ballpoint pen is provided in which the width of the drawing line can be changed, wherein responsiveness can be improved when distinguishing between drawing thin lines and thick lines. A ballpoint pen 1 provided at the pen tip side with a first writing part having a writing ball 25, wherein the ballpoint pen 1 is characterized by being provided with a writing part at the pen tip side with which it is possible to write a thicker line than the line written with the first writing part, only the first writing part being used when the writing weight is 1 g and the writing angle is 90, and the second writing part being used when the writing weight is 200 g, and the writing angle is 40-90.

A writing instrument excellent in handwriting density and temporal stability. The writing instrument includes a ball-point pen tip attached to the front end portion of the ink storage cylinder; and a ball-point pen refill having an ink composition for a writing instrument loaded therein. The ink composition for the writing instrument is a thermochromic ink containing at least a thermochromic microcapsule pigment. The writing instrument includes a pressurization mechanism for applying a pressure to the back end of the ink composition for the writing instrument.

A writing instrument excellent in handwriting density and temporal stability. The writing instrument includes a ball-point pen tip attached to the front end portion of the ink storage cylinder; and a ball-point pen refill having an ink composition for a writing instrument loaded therein. The ink composition for the writing instrument is a thermochromic ink containing at least a thermochromic microcapsule pigment. The writing instrument includes a pressurization mechanism for applying a pressure to the back end of the ink composition for the writing instrument.

A ballpoint dot pen tattoo cartridge includes a ballpoint pen element comprising an ink reservoir housed within a tapered bottom barrel providing a first barrel aperture and flanged top surface. A second barrel aperture in cylindrical top of the barrel includes a diameter larger than the first aperture with an assembly to attach the barrel cylindrical top to a tattoo machine. A resilient element within the barrel is sized to receive the ballpoint pen element between the first barrel aperture flanged top surface and two equal sized tabs on the ballpoint pen providing exit and retraction of the ballpoint pen assembly for ink discharge from the cartridge barrel tapered bottom whereby a tattoo machine operator controls the driving actuation of the tattoo machine to the ballpoint pen tip for controlling inked markings of a material.

A ballpoint dot pen tattoo cartridge includes a ballpoint pen element comprising an ink reservoir housed within a tapered bottom barrel providing a first barrel aperture and flanged top surface. A second barrel aperture in cylindrical top of the barrel includes a diameter larger than the first aperture with an assembly to attach the barrel cylindrical top to a tattoo machine. A resilient element within the barrel is sized to receive the ballpoint pen element between the first barrel aperture flanged top surface and two equal sized tabs on the ballpoint pen providing exit and retraction of the ballpoint pen assembly for ink discharge from the cartridge barrel tapered bottom whereby a tattoo machine operator controls the driving actuation of the tattoo machine to the ballpoint pen tip for controlling inked markings of a material.