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[Patent] High-mounted telephoto document camera with an eye-position observation plate

[Patent] Rotating Shaft Mechanism and Telescopic (Zoom) Lens System

[Patent] Head-Mounted fixation device

[Patent] Height-adjustable high-Mounted document camera

[Patent] Telescopic zoom lens system

[Patent] Optical magnifying device

[Patent] Head-mounted optical magnification device.

[Patent] Interchangeable lens optical magnifier.

[Patent] Anti-shake magnifier & stable stand

[Patent] Pivot structure of magnification display device.

[Patent] Magnifying display device.

[Patent] Base mount for high-position magnifier.