Examples of a transparent whiteboard display are disclosed. In one example implementation according to aspects of the present disclosure, a transparent whiteboard display causes digital content to be viewable on the transparent whiteboard display when the transparent whiteboard display is in a display mode. The transparent whiteboard display also causes analog content to be viewable on the transparent whiteboard display when the transparent whiteboard display in a transparent mode.

A glass board projection system includes a support board having a front surface with a defined area extending a length and a width; an anti-glare projector board composed of a glass material and that is removably secured to the support board, the projector board having a thickness extending from a front surface to a back surface; an attachment device rigidly attached to and protruding from the back surface of the anti-glare projector board and configured to removably attach to the front surface of the support board; and a gap formed between the support board and the anti-glare projector board, the gap being formed by the attachment device.

A glass board projection system includes a support board having a front surface with a defined area extending a length and a width; an anti-glare projector board composed of a glass material and that is removably secured to the support board, the projector board having a thickness extending from a front surface to a back surface; an attachment device rigidly attached to and protruding from the back surface of the anti-glare projector board and configured to removably attach to the front surface of the support board; and a gap formed between the support board and the anti-glare projector board, the gap being formed by the attachment device.

A frame-type air purifier includes a purifier housing, a main frame and an image board. The purifier housing has a back plate and a front plate configured opposite to each other. The back plate has a wall positioner configured thereon. The front plate includes a first quick-demounting member configured thereon. The main frame has a central hollow and a second quick-demounting member configured thereon. The image board includes a baseboard and an imaging sheet configured on the baseboard, wherein the baseboard has a third quick-demounting member configured thereon. The first quick-demounting member of the purifier housing selectively assembles with the second quick-demounting member of the main frame correspondingly, or selectively assembles with the third quick-demounting member of the image board correspondingly.

A frame-type air purifier includes a purifier housing, a main frame and an image board. The purifier housing has a back plate and a front plate configured opposite to each other. The back plate has a wall positioner configured thereon. The front plate includes a first quick-demounting member configured thereon. The main frame has a central hollow and a second quick-demounting member configured thereon. The image board includes a baseboard and an imaging sheet configured on the baseboard, wherein the baseboard has a third quick-demounting member configured thereon. The first quick-demounting member of the purifier housing selectively assembles with the second quick-demounting member of the main frame correspondingly, or selectively assembles with the third quick-demounting member of the image board correspondingly.

A new design for a dry-erase board allows for writing on a clear top surface or a second surface under the clear top surface. The dry-erase board includes an insert positioned between the clear top surface and a second surface, the insert being protected by the clear top surface.

A new design for a dry-erase board allows for writing on a clear top surface or a second surface under the clear top surface. The dry-erase board includes an insert positioned between the clear top surface and a second surface, the insert being protected by the clear top surface.

This document discloses magnetic sewing rulers, cutting mats, magnetic holders and magnetic ruler sewing kits are disclosed that provide tools to securely and easily hold fabrics and other sewing materials in place on a cutting mat for laying out, measuring, cutting, pinning, etc. when engaged in sewing projects. The magnetic rulers, cutting mats, and magnetic holders provide security in holding projects to allow a person to use their hands freely during sewing projects.

This document discloses magnetic sewing rulers, cutting mats, magnetic holders and magnetic ruler sewing kits are disclosed that provide tools to securely and easily hold fabrics and other sewing materials in place on a cutting mat for laying out, measuring, cutting, pinning, etc. when engaged in sewing projects. The magnetic rulers, cutting mats, and magnetic holders provide security in holding projects to allow a person to use their hands freely during sewing projects.

The present invention provides tablets with interconnection features and a system of multiple tablet assemblies removably interconnected to one another. The tablets may be removably mounted to a vertical surface or positioned on a horizontal surface. Features of the present invention allow a user to remove or move one tablet from the system without disrupting or moving the other tablets.