Guardian

Guardian is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Auto Interlock Devices
• Ignition Interlock Devices

North American Industry Classification System (NAICS) Categories:

• Other Motor Vehicle Electrical And Electronic Equipment Manufacturing > Ignition Apparatus > Ignition Interlock Devices
• Automotive Parts And Accessories Stores > Auto Engines & Parts > Auto Interlock Devices

Standard Industry Classification (SIC) Categories:

• Electrical Equipment For Internal Combustion Engines > Ignition Apparatus > Ignition Interlock Devices
• Auto & Home Supply Stores > Auto Engines & Parts > Auto Interlock Devices