Patent ID: 7108184

Claim:
A medical container having a negative image bar code comprising: a medical container comprising transparent plastic film; a first plurality of light-reflecting segments disposed on the medical container film, wherein the medical container film defines first spaces that separate the first plurality of light-reflecting segments, wherein the film defining the first spaces also itself defines a first set of light-absorbing segments, and wherein the first plurality and the first set define a first negative image bar code representing fixed information; a second plurality of light-reflecting segments disposed on the medical container film, wherein the medical container film defines second spaces that separate the second plurality of light-reflecting segments, wherein the film defining the second spaces also itself defines a second set of light-absorbing segments, wherein the second plurality and the second set define a second negative image bar code representing variable information, wherein the variable information comprises at least one selected from the group consisting of: lot number, batch number, expiration date, serial number, production time, price, and concentration; and wherein the first bar code and the second bar code are each detectable using a reader.