patents

Under normal circumstances Ingenieurbuero Erckert is not interrested in filing own patents. Usually patents are a side effect of daily work. In most cases the ownership of the patents is transferred to our customers. So my name 'Ricardo Erckert' gets mentioned but the owner of the patent is some other company. Sometimes there even are patents filed at the same time (but of course different topics) by different customers.
To avoid any conflict Ingenieurbuero Erckert never works on related project for different customers. If we work for one customer on a certain topic this specific topic gets blocked for all other customers for at least 5 years. This gives our customers time to reach production and get ahead of competition. So if we refuse to do a certain project for you please don't be upset. The field may already be occupied by an other customer - and of course, if we get asked to work on a topic we are already working on for you, we will refuse and protect you in the same way.
The following table lists the patents I'm on the list of inventors. Some topics are patented multiple times for different markets, sometimes with delays of a decade or more! So a huge table doesn't mean it is really significant. The source of the list was a google patents search carried out August 21 2025. (Often I don't even get informed when customers filed a patent based on one of my circuits. I'm surprised myself!)

patent no.	title	date	owner
US7541799B2	Method and device for measuring a current flowing in an electrical conductor	2009-06-02	TDK Electronics AG
DE102019218998A1	Method and control circuit for controlling at least one power transistor to be switched	pending	Robert Bosch Gmbh
US20110271130A1	Circuit configuration having a transceiver circuit for a bus system and nodes for a bus system	2014-07-08	Robert Bosch Gmbh
US20060279894A1	Protection arrangement for protecting a power semiconductor component against overcurrent and overtemperature	2011-01-25	Infineon Technologies AG
DE102008057629B4	High frequency differential amplifier and transceiver circuit	2021-09-09	Robert Bosch GmbH
WO2010052066A1	Circuit arrangement for amplifying a digital signal, and transceiver circuit for a bus system	?	Robert Bosch Gmbh
EP4193263A1	Sensor and sensor network	2024-07-17	Robert Bosch Gmbh
DE102008057627B4	Receiver circuit for a differential input signal and transceiver circuit for a bus system	2020-08-27	Robert Bosch GmbH
US5448466A	Method for limiting the frequency of a voltage-controlled oscillator in a control circuit of a resonant converter switched-mode power supply, and control circuit for a resonant converter switched-mode power supply	1995-09-05	Infineon Technologies AG
US5032972A	Method and circuit configuration for increasing the efficiency of resonant converter power supply circuits	1991-07-16	Siemens AG
DE102019203902A1	Power transistor arrangement	ceased	Robert Bosch GmbH
WO2010052297A3	Circuit arrangement comprising an integrated transceiver circuit disposed on a circuit support, and nodes for a bus system	?	Robert Bosch GmbH
DE102008057622A1	Level converter for use in e.g. motor vehicle, has coupling circuit coupling output circuit with input circuit, such that flip-flop is resettable by input circuit and/or reset flip-flop is settable by input circuit	withdrawn	Robert Bosch GmbH
DE4215980A1	Active freewheel element	withdrawn	Siemens AG Siemens Corp
DE10223996B4	Reference voltage circuit and method for generating a reference voltage	2004-12-02	Infineon Technologies AG
DE4232032A1	TWO-WIRE CURRENT LOOP CIRCUIT FOR MEASURING VALVE	withdrawn	Siemens AG Siemens Corp
US5914589A	Voltage boosting circuit for high-potential-side MOS switching transistor	1999-06-22	STMicroelectronics GmbH STMicroelectronics SRL
DE19635911C1	High potential side MOS switching transistor and charge pump electric circuit	1998-05-07	STMicroelectronics lnc USA
DE102008057623B4	Transmitter circuit for sending a differential signal via a bus system and transceiver circuit with such a transmitter circuit	2020-08-27	Robert Bosch GmbH
JPH08237086A	Comparator with hysteresis using bipolar technology	2004-01-19	STMicroelectronics GmbH STMicroelectronics lnc USA
DE102009047895A1	Receiver circuit for transceiver circuit for motor vehicle, has voltage source for temperature-dependent determination of potentials formed such that temperature drift of transistors of amplifier is partially balanced	2021-01-14	Robert Bosch GmbH
DE102008057626A1	Receiver circuit for transceiver circuit of FlexRay communication system in utility vehicle for receiving data, has amplifier for amplifying input signal, and including inputs that form bus connections for connecting wire pairs of bus line	2020-08-27	Robert Bosch GmbH
DE102020210045A1	sensor and sensor network	withdrawn	Robert Bosch GmbH
DE19701377A1	Driver circuit	1999-07-29	STMicroelectronics lnc USA
EP0654893B1	Drive circuit for a stepper motor	1998-02-25	STMicroelectronics GmbH STMicroelectronics lnc USA
DE60025980D1	Electronic driver circuit with multiplexer, for optionally controlling a load or a bus line, and corresponding method	2006-04-20	NXP USA Inc
DE19750317B4	Receiving circuit for a CAN system	2006-06-14	STMicroelectronics GmbH STMicroelectronics lnc USA
EP0640259A1	SCHMITT TRIGGER	1996-05-01	STMicroelectronics GmbH STMicroelectronics lnc USA
WO2010052292A1	Output circuit for a transceiver circuit for a bus system, and transceiver circuit for a bus system	?	Robert Bosch Gmbh
DE19702602C1	Driver- and overload protection circuit for electric switch arrangement	1998-08-20	STMicroelectronics lnc USA
EP0482241A1	Integrated bipolar transistor	withdrawn	Siemens AG Siemens Corp
EP0578098B1	Integrated driver circuit for a reactive load	1996-09-04	Siemens AG, Siemens Corp

(Last update Aug. 21 2025 based on a patent search on https://patents.google.com/?inventor=Ricardo+Erckert)