How to Read This Report
This page aggregates publicly available records from government agencies, court systems, and official registries into a single report for William Kostenko. Because public records are indexed by name rather than by a unique identifier, the 72 results displayed here may include information belonging to multiple individuals who share the same name — a common occurrence, especially for frequently appearing names. To determine which records belong to the person you are researching, compare the location, approximate age, and any associated details across entries. Records that share an address or overlapping timeframe are more likely to refer to the same individual.
What Each Data Category Means
Property Records
Property records originate from county assessor and recorder offices, where real estate transactions, ownership transfers, and tax assessments are documented as a matter of public record. The assessed value shown for a property is the figure used by the county to calculate property taxes and frequently differs from the property's current market value — in many jurisdictions assessed values lag behind market conditions by several years. A property record updates whenever a new deed, lien, or assessment is filed with the county, so the ownership and valuation data shown here reflects the most recent filing available in our sources rather than a real-time snapshot.
Voter Registration
Voter registration data is maintained by state and county election offices and is considered public record under the election laws of most states. The party affiliation shown reflects the voter's registration at the time the record was filed; it does not necessarily indicate current political preferences, as voters may change their affiliation or register differently in subsequent elections. Not all states make their voter files publicly available — some restrict access or redact certain fields such as date of birth or residential address — so the completeness of voter data varies by state. Registration status (active or inactive) indicates whether the election office considers the registration current, not whether the person actually voted in recent elections.
Campaign Finance Contributions
Federal election law requires the disclosure of political contributions exceeding $200 to any single committee in a calendar year. These records are filed with the Federal Election Commission (FEC) and include the donor's name, mailing address, employer, occupation, and the amount contributed. Contributions to state and local candidates are governed by each state's campaign finance laws, which may set different disclosure thresholds. The data shown here reflects what was reported in official filings and may include contributions made over the course of many election cycles, so the dates and amounts should be read in their historical context.
Patent Filings
Patent data is drawn from the United States Patent and Trademark Office (USPTO). Being listed as an inventor on a patent means this individual is credited as having made a substantive intellectual contribution to the invention described in the patent application. Patent records include the filing date, grant date, patent number, and a description of the invention. A patent listing does not indicate that the inventor currently owns the patent rights — patents are frequently assigned to employers or transferred between entities after they are granted.
Important Limitations
Public records may contain outdated information, data entry errors, or records that belong to a different person who shares the same name as the individual you are researching. Government agencies update their records on varying schedules, and the data shown here may not reflect the most recent changes. Information on this page is provided for informational purposes only and should not be used for employment screening, tenant screening, credit decisions, or any other purpose regulated by the Fair Credit Reporting Act (FCRA). Always verify critical details through the originating government agency or official registry.
Your Rights
If you are the person described in these records, you have rights regarding your personal data. Under laws including the California Consumer Privacy Act (CCPA) and similar state privacy statutes, you may request the deletion or correction of your personal information. To submit a removal request, visit our opt-out page. For a complete description of how we collect, use, and protect personal data, please review our privacy policy.