US 5,636,346 · Granted 1997-06-03

The 1997 Patent That Pioneered Privacy-Safe Targeted TV Ads

Before Netflix and YouTube knew what you wanted to watch, this patent invented a system to show different TV commercials to different neighborhoods—without actually revealing who you are. It used secret codes to match what advertisers wanted to sell with the kinds of people who'd want to buy it, all while keeping subscriber names locked away.

Curated and verified by the IsItPatented Editorial team

The plain-English version

What it protects

The claim covers a system for matching advertiser target audiences to cable and phone company subscriber lists using encoded binary data that masks individual identities. What's protected here is the method of converting subscriber information into encrypted codes, then comparing those codes to advertiser audience profiles—all without ever exposing real names or addresses to the advertiser. The patented software creates unique conversion rules for each carrier system and changes them monthly to prevent reverse-engineering.

Why it matters

This patent was ahead of its time in addressing a fundamental tension: marketers want to reach the right audience, but subscribers don't want their personal data exposed. By encoding both subscriber data and advertiser profiles into matched binary streams, The Electronic Address created a privacy-preserving layer that became foundational to how cable networks would later sell targeted advertising. It's an early legal framework for what became central to digital marketing compliance decades later.

Real-world use

In the late 1990s, if you lived in a wealthy zip code, you might see luxury car ads during your local news, while the neighborhood five miles away saw furniture sales—all managed through this system matching encoded audience profiles to cable subscriber clusters.

Original USPTO abstract

A method and system for selectively targeting advertisements and programming to different demographically and specially targeted television audiences by relating carrier subscriber data to other proprietary marketing databases by creating, compiling and updating a National Directory of cable and other carrier system subscriber names and address information derived from actual cable system and telephone company billing records; providing proprietary software to participating carrier systems to allow them to modify the subscriber records in a uniform fashion at the carrier system level using unique electronic address designations, by encoding the subscriber information into encoded binary streams using proprietary binary conversion rules and binary signatures assigned to the carrier systems, and changing the conversion rules, signatures and their carrier designations for security on a monthly basis when the National Directory is updated; licensing the Directory to qualified data processing companies or their clients, each of which will receive proprietary software allowing it first to encode its own client's database and/or modeled target audience profiles into encoded binary streams using other proprietary binary conversion rules and binary signatures, and then to match the client's database or audience profiles to the Directory, while still maintaining subscriber privacy; and "matching" the Directory to the client's database or to specific audience parameters, characteristics and profiles desired by the marketers, using the encoded binary streams and proprietary software, in a manner that does not reveal the subscriber name, address or other identifying information and in a manner that cannot be reverse-engineered.

Patent details

Publication number: US 5,636,346
Filing date: 1994-05-09
Grant date: 1997-06-03
Assignee: The Electronic Address, Inc.
Inventor(s): SAXE; ANDREW N. G.
CPC class: H04N21/812

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