The tag*a*long is covered by US Utility Patent US8464397 filed in 2010. 

We licensed our IP to Skip*Hop back in 2013 for them to create their own version of the handle. We parted ways in 2015 and the item is no longer available for sale (legally). It was marketed and sold under the name Walk-Along Handle. You can see and read the reviews of it still here.

We are actively looking for new IP partners- but not ripoffs. Thank you in advance for not coping our patented design.