G09- EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS.G06F15/0216- Constructional details or arrangements.G06F15/02- Digital computers in general Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g.G06F15/00- Digital computers in general Data processing equipment in general.G06- COMPUTING CALCULATING OR COUNTING.capable of projecting hand-writing or drawing during action G03B21/00- Projectors or projection-type viewers Accessories therefor.G03B- APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ACCESSORIES THEREFOR.G03- PHOTOGRAPHY CINEMATOGRAPHY ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES ELECTROGRAPHY HOLOGRAPHY.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from US07/400,158 external-priority patent/US5035502A/en Application filed by Individual filed Critical Individual Priority to US08/040,538 priority Critical patent/US5590944A/en Application granted granted Critical Publication of US5590944A publication Critical patent/US5590944A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Individual Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Stokes Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US08/040,538 Inventor William T. Google Patents US5590944A - Projectable timerÄownload PDF Info Publication number US5590944A US5590944A US08/040,538 US4053893A US5590944A US 5590944 A US5590944 A US 5590944A US 4053893 A US4053893 A US 4053893A US 5590944 A US5590944 A US 5590944A Authority US United States Prior art keywords casing clock time liquid crystal timing Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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