Belkin Official Support - Setting Up a Wireless Bridge Between your Wireless Router and a Secondary Access Point
Firewalla: Transparent Bridge Mode – Firewalla
Amazon.com: D-Link DWM-311-B1, 4G LTE (Cat 4) to Gigabit Ethernet Modem/ Bridge, Best for M2M Applications, Supports OpenVPN, Optional Enterprise Service Platform, Works on Verizon or AT&T : Electronics
Bridge Mode (Router + Firewall)
Connect Two Wireless Router Wirelessly ( Bridge ) With Open Source Software - nixCraft
What is Bridge Mode on a Router?
Linksys Official Support - Setting the Linksys WAP300N to Wireless Bridge mode
Wireless Bridge Mode - Networking - YouTube
Bridge Mode - LTE USB Modem - Network and Wireless Configuration - OpenWrt Forum