Style-matched optional accessories for your Reader include a form-fitting cover with built-in lighting arm that angles for reading at night or in dimly lit places.

ENGADGET: Sony's new Reader Wi-Fi is the world's lightest 6-inch e-reader with multitouch screen (update: powered by Android)

Saying that gamers want flexibility in how and where they play, Razer will offer optional accessories to allow players to customize their gaming experiences through hardware attachments.

CNN: At CES, Razer rolls out tablet for hard-core gamers

It's called the Pleo Reborn (or "RB" for short) and the primary features are these: a lithium-polymer battery good for two hours of continuous use, a much tougher hide, and an RFID "sense of smell" that lets it interact with a variety of optional accessories to "eat, " take medicine for virtual injuries and learn new tricks as you go.

ENGADGET: Pleo Reborn detailed by Innvo CEO, one lucky fan finds and buys the tiny dino (video)

The COOLPIX P7700 offers compatibility with several optional Nikon accessories for enthusiasts who demand versatility and first-class performance.

ENGADGET: Nikon intros flagship Coolpix P7700 for prosumers, diminutive Coolpix S01 for fashionistas

The camera also features a Nikon 1 i-TTL hot shoe port, affording the use of optional lighting and camera accessories with the Nikon 1 V2.

ENGADGET: Nikon 1 V2 unveiled: 14.2 megapixel ILC shoots 15fps stills for $899.95 in November

Instead, trademark law protects brand names, logos, symbols, designs and other optional elements of apparel and accessories, and trade dress law protects the design, packaging or appearance of apparel and accessories, solely to the extent they identify the source and origin of such products.

FORBES: Protecting Fashion Designs