Patent invalidity dossiers.

I'll run targeted searches for this patent number and check litigation dockets. US 4,513,390 — "System for digital transmission and synthesis of integrated data" Identification (as recorded in the authoritative Google Patents full text) |…

I'll search for the specific patent number and check for any related 2026 CAFC docket activity. Let me verify litigation status and confirm no Federal Circuit activity involving this patent. US 4,521,677 — Search Results Summary…

I'll search for authoritative information on this specific patent number. Let me check for litigation and current USPTO status. US Patent 4,524,898 — Verified Summary Search scope note: I searched Google Patents, Justia…

I'll search for authoritative information on US 4537861, including any litigation or CAFC 2026 activity. Let me gather the exact claim language and check for any litigation history. Let me try to retrieve the full text of the independent…

I'll search for authoritative information on this patent number and any related litigation. Let me run a few more targeted searches to check for litigation/docket activity and confirm the bibliographic record. US Patent 4,539,585 —…

I'll search for litigation and docket information on this specific patent number, then summarize. Let me try additional targeted searches. US Patent 4,558,326 — Analyst Summary Search scope note: I searched for this specific number (no…

I'll search for the specific patent and any litigation references. Search Results Summary — US 4,561,223 Search scope performed: Google Patents (full authoritative text supplied), Justia Patents, general web queries for the number, and…

I'll run targeted searches for this patent number, including any litigation/docket activity. US 4,563,739 — Verification Summary I searched for this patent number along with its assignees, inventors, and any court/docket activity. Below is…

Search results for US 4,572,140 — as-found record I ran targeted searches against Google Patents, Justia, OSTI, FreePatentsOnline, and general web indices, plus queries aimed at Federal Circuit / CAFC 2026 dockets. No CAFC or…

I'll run targeted searches for this exact patent number and for any 2026 CAFC docket activity. Let me verify there is no litigation or 2026 appellate activity tied to this specific number, and confirm the current ownership chain. US Patent…

Here is a concise summary of US patent 4589389: Title: Fuel injection control apparatus for internal combustion engines Assignee: Hitachi Ltd. Inventors: Tokuo Kosuge, Kimiji Karino Filing Date: June 12, 1985 Issue Date: May 20, 1986…

I'll search for this specific patent number. Let me check for any litigation or CAFC docket activity involving this patent. Summary of US Patent 4,592,636 Important caveat up front: I ran targeted web searches rather than a direct…

I'll search for authoritative information on US 4602280 and any litigation/docket activity. US 4,602,280 A — Search Summary Important scope note: I searched for the literal number 4602280 and filtered out unrelated hits (the number 4602280…

I'll search for authoritative information on this patent number, including any litigation/docket activity. Let me check specifically for litigation/docket records and confirm the patent's legal status. US 4,603,970 — Research Summary…

I'll verify the live docket posture for this exact number before summarizing. US 4,610,541 — Concise Summary and 2026 Docket Screen Search scope note: I screened the exact numeric string 4610541 against (a) the CAFC April–July 2026…

I'll search for authoritative information on US 4,622,514, including any litigation/docket references, then summarize. US 4,622,514 — summary (searched as the literal number 4622514) Bottom line on the docket request: I found no CAFC (or…

I'll search for current information on this patent number, then compile the summary. US 4,628,193 — Patent Record Summary Search scope and limitations: I ran targeted web searches rather than a live PACER/CAFC docket query or a native…

I'll verify the patent record and check for any litigation or CAFC activity involving this number. Let me check specifically for any court docket activity. US Patent 4,630,895 — "LCD lightguide" Verification note: My searches for this…

I'll verify against live sources before summarizing. US 4635253 — Verification & Summary Search scope note: I ran targeted queries against Google Patents, EPO Global Patent Index, Unified Patents, and uspto.report. I found no CAFC 2026…

Summary — US Patent 4,642,639 Pat. No.: US 4,642,639 (US4642639A) — "Multichannel DME ranging system" Application: US 06/537,879, filed September 30, 1983 Issued: February 10, 1987 Inventor: David A. Nelson (Cedar Rapids, IA) Original…