This logo was used on early products. The characters, in order, are Nin, ten, and do.
Nintendo Playing Card Co.
By this point, Nintendo's wordmark began to bear, more or less, a resemblance to what it is today.
This logo was shaped as a hexagon and was used on toys.
The shape was changed to rounded rectangle, which would become the main design for over 40 years.
This logo was adopted when Nintendo became an electronic game company.
The logo's color was changed from red to gray. The red logo is still used in some cases.