Airgain is a leading provider of advanced antenna technologies used to enable high performance wireless networking across a broad range of devices and markets, including Consumer, Enterprise, and Automotive. Our innovative antenna systems are designed to address key challenges with wireless system performance faced by our customers. We provide solutions to complex Radio Frequency, or RF, engineering challenges and help improve wireless services that require higher throughput, broad coverage footprint, and carrier grade quality. Our antennas are deployed in carrier, fleet, enterprise, residential, private, government, and public safety wireless networks and systems, including set top boxes, access points, routers, modems, gateways, media adapters, portables, digital televisions, sensors, fleet and asset tracking devices. Through our pedigree in the design, integration, and testing of high performance embedded antenna technology, we have become a leading provider to the residential wireless local area networking, also known as WLAN, market, supplying to leading carriers, Original Equipment Manufacturers, or OEMs, Original Design Manufacturers, or ODMs, and chipset manufacturers who depend on us to achieve their wireless performance goals.
Our embedded and external antenna solutions support a variety of wireless access technologies across the licensed and unlicensed spectrum of frequency bands. These include IEEE 802.11 a/b/g/n, 802.11ac/ax, WCDMA, LTE, DECT, LPD, Bluetooth, ZigBee and Z-Wave, among others. In addition, we have expertise in the testing and benchmarking of wireless systems and devices. To satisfy the rapidly evolving technology needs of the industry, we have remained on the leading edge of next generation development by providing solutions for Multiple Input, Multiple Output, or MIMO, Multi User MIMO, or MU-MIMO, short range wireless technologies, beam forming, and active antenna technology.
Our design teams partner with customers from the early stages of antenna prototyping to device throughput testing to facilitate optimal performance and quick time to market. Our capabilities include design, custom engineering support, integration, and over-the-air, or OTA, testing. These capabilities have resulted in a strong reputation across the OEM, ODM and chipset manufacturer ecosystem. Our competencies and strengths have helped us secure design wins used in multiple reference designs from leading Wi-Fi chipset vendors. OEMs, ODMs, chipset manufacturers and service providers rely on these reference designs and our engineering skills to deliver superior throughput performance. We view our relationships with OEM, ODM, chipset manufacturers and service providers as an important attribute to our long-term strategy and success.
In 2018, we had over 1,000 antenna products in our portfolio which shipped worldwide and implemented across millions of devices. During 2018, we supplied our products to carriers, retailers, OEMs, ODMs and end users in three primary geographic regions: North America, Europe, and Asia Pacific. Our customer base includes ARRIS Group, Inc., AT&T (DIRECTV U.S., LLC), Belkin International, Inc., Charter Communications, Inc., Comcast Corporation, Dish Network, Liberty Global plc., Telefonica SA, Sagemcom SAS, Samsung, Technicolor SA and ZTE Corporation, among others. We have achieved significant growth in our business in a short period of time. From 2012 to 2018, our annual sales have grown from $18.2 million to $60.6 million, while our net loss has increased from a net loss of $1.1 million in 2012 to net loss of $2.6 million in 2018.
We primarily use third parties to manufacture our products while maintaining oversight for critical quality, test and calibration functions. As of December 31, 2018, we had 175 issued patents in the United States and 24 companion patents outside the United States, and 49 patent applications on file.